USD $25
Hemmi SKF Slide Ruler “Sun” with magnifying cursor.
Stock: 1
USD $25
Hemmi 1447M Slide Ruler “Sun” with magnifying cursor.
Stock: 1
USD $129
12″/10″ Full Size Duplex Trig Slide Rule
Includes special multi-decade expanded scales, capable of an astonishing 20-60 decades of dynamic range.
Eye Saver yellow aluminum construction with black and red contrasting scales, very high quality, American Made, Pickett rule. A very useful rule, ideal for many engineering tasks.
(18 Scales)
Front – K, A, [ B, T, S, CI, C, ] D, L
Back – K*, A*, [ B*, T*, S*, CI*, C*, ] D*, L*
Stock: 1
USD $85
12″/10″ Full Size Simplex Trig Slide Rule
This isa self-teaching rule, with extensive directions on the reverse side.
T (Traditional) White aluminum construction. Very high quality, American Made, Pickett rule. An excellent student rule with good trig capability, includes the original box, leather case, and instruction manual.
(9 Scales)
Front – K, A, [ B, T, S, CI, C, ] D, L
Back – instructions, fractional/decimal equivalents
Stock: 1
USD $95
12″ / 10″ Trig Slide Rule
Very nice trig rule with black and red (inverse) scales, on the yellow (Eye Saver) body. This has the split square root scales, S, T and ST, plus DI scale for more calculating power and precision. Includes black textured leather case with gold embossed Pickett logo.
(17 Scales)
Front – K, A, [ B, ST, T, S, C ], D, DI
Back – L, DF, [ CF, CIF, CI, C ], D, DI
Stock: 1
USD $159
12″ / 10″ Dual Base Log Log Speed Slide Rule
Includes original user manual and leather case. Dual log scale design with repeated C/D scales and DI scale for ease and speed of use.
This is a very sophisticated Log Log rule, made in the trademark adjustable aluminum body format by Pickett, an enhanced N500/800 design with added scale features.
Note that the full Pickett teacher’s manual is now on line in Adobe Acrobat PDF format HERE for you FREE!
(28 Scales)
Front – LL0-0.001, LL0+0.001, LL1+0.01, LL1-0.01, DF, [ CF, CIF, L, CI, C ], D, LL2+0.1, LL2-0.1, LL3+1.0, LL3-1.0
Back – Sq Rt1, Sq Rt2, K, A, [ B, ST, T, CI, S, C ], D, DI, DFm
Stock: 1
USD $139
12″ / 10″ Hi Log Log Duplex Slide Rule
Eye-saver yellow (ES) coated aluminum construction, black and red scales. This is a very sophisticated Log Log rule, made in the trademark aluminum body format by Pickett. Comes with original Pickett leather case.
Note that the full Pickett teacher’s manual is now on line in Adobe Acrobat PDF format HERE for you FREE!
(22 Scales)
Front – LL2+0.1, LL2-0.1, DF [ CF, CIF, L, CI, C ] D, LL3+1.0, LL3-1.0
Back – LL1+0.01, LL1-0.01, A, [ B, T, ST, S, C ] D, DI, K
Stock: 2
USD $39
This is an introductory student rule with 9 scales, and useful formulas and conversion data tables on the reverse side. Great for beginners and collectors alike.
Scales include:
Front – A, B, CI, C, D, K, S, L, T
Back – Formulas and data table
Stock: 1
USD $129
One of Pickett’s more advanced rules, this 22 scale, aluminum body rule comes in Eye-saver yellow (ES), with black and red scales. This is a very sophisticated Log Log rule, made in the trademark aluminum body format by Pickett. The original case on this rule has some wear and damage, but does come with the belt loop accessory.
Scales include:
Front – LL2+0.1, LL2-0.1, DF [ CF, CIF, L, CI, C ] D, LL3+1.0, LL3-1.0
Back – LL1+0.01, LL1-0.01, A, [ B, T, ST, S, C ] D, DI, K
Stock: 1
USD $165
Class D(ish): What happens when you have a rule of this type that’s missing a box and some other items, that’s not quite a Class D, but isn’t quite a Class E? The result? The Dish Class. Reasonable condition. Visible/pronounced scale bleeding on both sides, the case on this rule isn’t as nice as a full Class D, but it’s also on sale…
Faber Castell’s advanced duplex log log rule, widely used in Europe but seldom seen in North America, This rule has a plastic body with adjustable gold anodized aluminum end braces, black and red filled and engraved scales, plus green accent stripes. This is a powerful design with the Rietz overrange scale extensions, Pythagorean scale (P) 6 log log scales and w and W’ expanded square root scales. Scales are sall self-documenting on the right hand side, and the rule has a 5/6 line cursor.
Scales include:
Front – T1, T2, K, DF, [ CF, CIF, CI, C, ] D, S, ST, P
Back – LL03, LL02, LL01, W2 [ W2′, L, C, W1′, ] W1, LL1, LL2, LL3
Stock: 1
USD $49
ES (Eye-Saver) Yellow aluminum construction, high-quality American made, Pickett rule. An excellent student rule with good trig capability, that never loses its instruction manual (it’s printed on the back).
The case on this rule is damaged and in poor condition.
Scales include:
Front – K, A, [ B, T, S, CI, C, ] D, L
Back – instructions, fractional/decimal equivalents
Stock: 1
USD $49
This is an advance 24 scale rule, that features feet on both sides of the rule for easy desktop use, and a cursor with 6 markers. As with most Aristo rules, it comes with black and red scales, as well as yellow bands on the slide for easier reading.
This rule has pronounced discoloration on both sides, but is still in very usable condition.
Scales include:
Front – LL01, LL02, LL03, DF, CF, CIF, L, CI, C, D, LL3, LL2, LL1
Reverse – LL00, K, A, B, T, ST, S, C, D, DI, LL0
Stock: 1
USD $95
An excellent full sized Trig rule, great for high school students. All scales are self documenting on the right hand side. Nestler’s late production style duplex rule. BRAND NEW rule, with 2 part plastic case. Has normal and folded basic scales (at 3), expanded trig scales, and a 6 line cursor. Has green body supports, and a pale green stripe on the entire slide (both sides), and black and red filled/ engraved scales.
Scales include:
Front – K, A, [ B, CI, C, ] D, L
Reverse – T1, T2, DF, [ CF, CIF, CI, C, ] D, S, ST
Stock: 1
USD $35
This is an excellent starter rule which features additional markings on the scales to help explain the core functions of multiplication and division.
Scales include:
Front – A, B, CI, C, D, K, S, L, T
Back – Blank
Stock: 3
USD $175
This is a very sophisticated 34 scale rule, made in the trademark aluminum body format by Pickett, an extremely powerful but somewhat crowded rule. Has hyperbolic scales, expanded trig, square and cube root scales, DI and two types of folded scales. Comes with the original brown leather case.
Scales include:
Front – LL1+.000, LL1-.000, LL2+.00, LL2-.00, DF/m, [ CF/m, TH, SH, SH, L, CI, C, ] LL3+.0, LL3-.0, LL4+0., LL4-0.
Back – 3 cube root scales, DF [ CF, CIF, T, T, ST, S, CI, C, ] D, DI, 2 square root scales
Stock: 2
USD $29
An economical and practical student rule for the beginner slide rule enthusiast! Plastic body, with contrast color slide for easier reading. Comes with a leatherette case.
Scales include:
Front – L, K, A, B, CI, C, D, ST, T, S
Back – Blank
Stock: 2
USD $25
A clear and easy to read student rule, with yellow (taupe?) contrast bands on the rule for easier reading. Includes a leatherette case.
Scales include:
Front – A, DF, CF, CIF, CI, C, D, K
Back – Blank
Stock: 2
USD $29
An economical and practical student rule for the beginner slide rule enthusiast! Plastic body, with contrast color slide for easier reading.
Scales include:
Front – L, A, DF, CF, CI, C, D, ST, T, S
Back – Blank
Stock: 1
USD $75
This 24 scale full size rule features a green slide for easy reading, and high-contrast black and red scales. Comes with the original blue leather Staedtler case.
This rule has damage to one of the end brackets, and has been discounted.
Scales include:
Front – CI, T, ST, DF, CF, CIF, CI, C, D, P, S, CS
Back – LL01, LL02, LL03, A, B, L, K, C, D, LL3, LL2, LL1
Stock: 1
USD $195
Very good condition log log duplex rule, with hyperbolic sine and tangent scales, additional vector/radian engineering scales, and inverted sine/tangent scales. Has folded scales, extended/inverted trig scales, and 3 log log scales. A very nice high end bamboo duplex rule, with a very uncommon scale set.
This rule comes with its factory box, and carton slip case.
Scales include:
Front – Sh1, Sh2, Th, A, [ B, TI1, TI2, SI, C, ] D, DI, x, theta
Back – L, K, DF, [ CF, CIF, CI, C, ] D, LL3, LL2, LL1
Stock: 1
USD $195
Log log duplex rule, similar to the POST Versalog, but with both A and B scales. Has folded and extended trig scales, and 8 log log scales. A very nice high end bamboo duplex rule, and one of Hemmi’s most popular models outside North America. This specific rule comes with the original factory box, and carton slide case instead of the leather case.
Scales include:
Front – LL/1 (e-0.01<-0.1), LL/2 (e-0.1<-1.0), LL/3 (e-1.0<-10), DF, [ CF, CIF, CI, C, ] D, LL3 (e+1>10), LL2 (e+0.1>1.0), LL1 (e+.01>.1).
Back – L, K, A, [ B, T, S, ST, C, ] D, DI, LL0 (e+.001>.01), LL/0
Stock: 1
USD $275
Class D (reduced from USD$325): Reasonable condition. Visible/pronounced scale bleeding on both sides, case may have considerable dark spots and/or discoloration.
Considered to be the most advanced slide rule produced: gold anodized adjustable aluminum end braces, duplex 5/4-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides), plus additional blue stripes on the A and B scales, and massive 2 1/4″ wide body. Expanded W square root scales, for both the square root of x and 10x, 8 log log scales, and raised rubber bumpers to prevent cursor scraping, and to give the rule grip on a desktop. Body is fully alignable at the aluminum end-pieces, and provides finger grip areas on the slide for better movement. Cursor pops off (note the recess on the side bars) for easy cleaning, while retaining its alignment, a very handy feature! Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), expanded square scales, folded scales and scale over-ranges.
This specific rule comes in a rare FC slide box, as opposed to the standard leather case.
Scales include:
Front – T1, T2, K, A, DF, [ CF, B, CIF, CI, C, ] D, DI, S, ST, P
Back – LL03, LL02, LL01, LL00, W2 [ W2′, CI, L, C, W1′, ] W1, LL0, LL1, LL2, LL3
Stock: 1
USD $175
Log Log Duplex Decitrig Slide Rule one of K+E’s premiere duplex rules, in the final updated Ivorite format. Green composite, K+E case and embossed logo on the leather flap.This is the updated version of the famous older 4081-3 rule, also later called the 68-1251, and has two color rule markings, slanted trig scale values for easy orientation and scale range data.
Scales include:
Front – LL02, LL03, DF, CF, CIF, CI, C, D, LL3, LL2
Back – LL01, L, K, A, B, T, SRT, S, D, DI, LL1
Stock: 1
USD $55
This all plastic rule features 22 scales, and contrasting red and black scales for easier reading.
Scales include:
Front – LL01, LL02, LL03, A, B, L, K, C, D, LL3, LL2, LL1
Back – T, ST, DF, CF, CIF, CI, C, D, P, S
Stock: 1
USD $45
This may be a more basic rule for students, but it still has a variety of very useful features. It has a metric ruler on the upper edge of the rule, high contrast green scale accents, and black and red scales.
Scales include:
Front – K, A, B, L, CI, C, D, S, ST, T1, T2
Back – blank
Stock: 3
USD $139
One of Pickett’s more advanced rules, this 22 scale, aluminum body rule comes in Eye-saver yellow (ES), with black and red scales. This is a very sophisticated Log Log rule, made in the trademark aluminum body format by Pickett. Comes with the original leather case.
Scales include:
Front – LL2+0.1, LL2-0.1, DF [ CF, CIF, L, CI, C ] D, LL3+1.0, LL3-1.0
Back – LL1+0.01, LL1-0.01, A, [ B, T, ST, S, C ] D, DI, K
Stock: 1
USD $69
ES (Eye-Saver) Yellow aluminum construction, high-quality American made, Pickett rule. An excellent student rule with good trig capability, that never loses its instruction manual (it’s printed on the back).
Scales include:
Front – K, A, [ B, T, S, CI, C, ] D, L
Back – instructions, fractional/decimal equivalents
Stock: 11
USD $179
Originally made by Gilson but sold under a number of different marques (e.g. Post, Dietzgen, Tavella, etc), this 21 scale rule is recognized for its high visibility alternating yellow and white rings.
The rule has unique fractional ‘binary’ scales that permit operations directly with fractional numbers, and also drill size scales. Rotating dual cursors with a slip clutch on one side, and a single cursor on the other.
This specific rule and its case are in above average condition.
Scales include:
Front – C, CI, A, K, L, Log Log (1.0015-1,000,000), fractions, fractions, drill/thread, mm
Back – degrees, sines, tans, degrees, sines, tans, degrees, sines, tans, Fractional Conversions
Stock: 1
USD $149
Originally made by Gilson but sold under a number of different marques (e.g. Post, Dietzgen, Tavella, etc), this 21 scale rule is recognized for its high visibility alternating yellow and white rings.
The rule has unique fractional ‘binary’ scales that permit operations directly with fractional numbers, and also drill size scales. Rotating dual cursors with a slip clutch on one side, and a single cursor on the other.
This rule is in good condition, and the case is in acceptable condition with some fraying and marking.
Scales include:
Front – C, CI, A, K, L, Log Log (1.0015-1,000,000), fractions, fractions, drill/thread, mm
Back – degrees, sines, tans, degrees, sines, tans, degrees, sines, tans, Fractional Conversions
Stock: 1
USD $75
An excellent rule for promising engineers, this 22 scale rule comes with a formula reference card and rules, as well as a manual. Unfortunately they are in German, but math is the universal language, right?
Scales include:
Front – L, K, A, B, BI, CI, C, D, LL1, LL2, LL3
Back – T1, T2, DF, CF, CIF, S, C, D, S, ST, P
Stock: 1
USD $75
One side of the case may say Teledyne Post, but the other definitely says Hemmi. This is a beginner, single sided rule, that features feet on the reverse side for easier desktop use. We’ve only got one manual in stock, so not all rules come with manuals.
Scales include:
Front – T, K, A, B, CI, C, D, L, S, ST
Back – Blank
Stock: 3
USD $115
Easy to read with black and red scales, this is a good beginner rule that includes a metric ruler on the upper edge.
Scales include:
Front – K, A, B, CI, C, D, L, S, ST, T
Back – Blank
Stock: 1
USD $275
K+E’s famous Deci-Lon duplex rule, in very good condition. These cases are slightly different, being stitched/formed leather, as opposed to a folded/stitched leather case. Does not include any supplementary sheets or documents. This is K+E’s late production flagship rule, with unbreakable cursor, Ivorite body and adjustable frame, all free of marks, names or initials. Has 8 log log scales, a split square root scale, DI and folded scales. An outstanding and powerful rule, cleverly designed.
Scales include:
Front – Ln-3, Ln-2, Ln-1, Ln-0, A, [ B, T, SRT, S, C, ] D, DI, K
Back – Sq1, Sq2, DF, [ CF, CIF, L, CI, C, ] D, Ln0, Ln1, Ln2, Ln3
Stock: 3
USD $75
An advanced 24 scale rule that comes in a presentation case, rule features feet on the reverse side for easier desktop use.
Scales include:
Front – ST, T, T2, DF, CF, CIF, CI, C, D, DI, P, S
Back – LL01, LL02, LL03, A, B, L, K, C, D, LL3, LL2, LL1
Stock: 1
USD $275
K+E’s famous Deci-Lon duplex rule, in very good condition, with very good orange sewn leather case, and supplementary instruction/formula sheets. This is K+E’s late production flagship rule, with unbreakable cursor, Ivorite body and adjustable frame, all free of marks, names or initials. Has 8 log log scales, a split square root scale, DI and folded scales. An outstanding and powerful rule, cleverly designed.
Scales include:
Front – Ln-3, Ln-2, Ln-1, Ln-0, A, [ B, T, SRT, S, C, ] D, DI, K
Back – Sq1, Sq2, DF, [ CF, CIF, L, CI, C, ] D, Ln0, Ln1, Ln2, Ln3
Stock: 1
USD $149
This 12 scale rule includes its original box and manual, and the rule features feet on the reverse side to enable easier desktop use.
Scales include:
Front – LL01, LL02, LL03, DF, CF, CIF, CI, C, D, LL3, LL2, LL1
Back – T, ST, K, A, B, BI, CI, C, D, L, P, S
Stock: 1
USD $225
This special late production Foxboro flow rule is used to calculate flow parameters and rates for liquids, steam or gas. This is the version custom made for Foxboro by Hemmi of Japan, and has red, blue and black engraved and filled scales.
Pipe schedules are color coded for easy operation. The unusual design uses many dedicated scales sets on both sides, and includes the fitted factory box and manual, and gold embossed leather case, all in MINT condition!. It’s a rule you will really enjoy in your collection, or on the job doing steam or hydraulic pipe fitting.
Stock: 1
USD $95
Wood based rule with 22 scales. Not rated for fishing, hunting, or vehicle maintenance. Pretty good at performing advanced mathematics.
Scales include:
Front – LL02, LL03, DF, CF, CIF, L, CI, C, D, LL3, LL2
Back – LL01, K, A, B, T>45, T<45, ST, S, D, DI, LL1
Stock: 1
USD $69
This beginner bamboo rule features a metric ruler on the upper edge of the rule, and an imperial rule on the lower edge.
Front – K, A, B, CI, C, D, L, S, ST, T
Back – Reference data and usage instructions
Stock: 1
USD $175
Powerful, new full sized rule with leather case, engraved black/red scales, adjustable bamboo body, framed glass cursor. Specialized electronics scales are described in the advertisement below. An uncommon and useful rule.
Operating manual can be downloaded here.
Scales include:
Front – db, Neper, DF [ CF, CIF, CI, C, ] D, LL3, LL2, LL1
Back – A, L, [ C, SI, TI ] D, Lambda, F
Stock: 1
USD $425
Class A (reduced from USD$495): Excellent/mint condition. Green cases may have some small dark spots/discoloration, brown cases have no discoloration. May have some minor scale bleeding on the reverse side of the rule (non-color side).
Considered to be the most advanced slide rule produced: gold anodized adjustable aluminum end braces, duplex 5/4-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides), plus additional blue stripes on the A and B scales, and massive 2 1/4″ wide body. Expanded W square root scales, for both the square root of x and 10x, 8 log log scales, and raised rubber bumpers to prevent cursor scraping, and to give the rule grip on a desktop. Body is fully alignable at the aluminum end-pieces, and provides finger grip areas on the slide for better movement. Cursor pops off (note the recess on the side bars) for easy cleaning, while retaining its alignment, a very handy feature! Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), expanded square scales, folded scales and scale over-ranges. Includes: Original box, case, original manual in Spanish, reprint manual in English, and accessory rule.
Scales include:
Front – T1, T2, K, A, DF, [ CF, B, CIF, CI, C, ] D, DI, S, ST, P
Back – LL03, LL02, LL01, LL00, W2 [ W2′, CI, L, C, W1′, ] W1, LL0, LL1, LL2, LL3
Stock: 2
USD $425
Class A (reduced from USD$495): Excellent/mint condition. Green cases may have some small dark spots/discoloration, brown cases have no discoloration. May have some minor scale bleeding on the reverse side of the rule (non-color side).
Considered to be the most advanced slide rule produced: gold anodized adjustable aluminum end braces, duplex 5/4-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides), plus additional blue stripes on the A and B scales, and massive 2 1/4″ wide body. Expanded W square root scales, for both the square root of x and 10x, 8 log log scales, and raised rubber bumpers to prevent cursor scraping, and to give the rule grip on a desktop. Body is fully alignable at the aluminum end-pieces, and provides finger grip areas on the slide for better movement. Cursor pops off (note the recess on the side bars) for easy cleaning, while retaining its alignment, a very handy feature! Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), expanded square scales, folded scales and scale over-ranges. Includes: Original box, case, original manual in Spanish, reprint manual in English, and accessory rule.
Scales include:
Front – T1, T2, K, A, DF, [ CF, B, CIF, CI, C, ] D, DI, S, ST, P
Back – LL03, LL02, LL01, LL00, W2 [ W2′, CI, L, C, W1′, ] W1, LL0, LL1, LL2, LL3
Stock: 3
USD $375
Class B (reduced from USD$425): Very good condition. Green cases may have some dark spots/discoloration. Some scale bleeding on reverse side (not the full color side) of the rule.
Considered to be the most advanced slide rule produced: gold anodized adjustable aluminum end braces, duplex 5/4-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides), plus additional blue stripes on the A and B scales, and massive 2 1/4″ wide body. Expanded W square root scales, for both the square root of x and 10x, 8 log log scales, and raised rubber bumpers to prevent cursor scraping, and to give the rule grip on a desktop. Body is fully alignable at the aluminum end-pieces, and provides finger grip areas on the slide for better movement. Cursor pops off (note the recess on the side bars) for easy cleaning, while retaining its alignment, a very handy feature! Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), expanded square scales, folded scales and scale over-ranges. Includes: Original box, case, original manual in Spanish, reprint manual in English, and accessory rule.
Scales include:
Front – T1, T2, K, A, DF, [ CF, B, CIF, CI, C, ] D, DI, S, ST, P
Back – LL03, LL02, LL01, LL00, W2 [ W2′, CI, L, C, W1′, ] W1, LL0, LL1, LL2, LL3
Stock: 9
USD $375
Class B (reduced from USD$425): Very good condition. Green cases may have some dark spots/discoloration. Some scale bleeding on reverse side (not the full color side) of the rule.
Considered to be the most advanced slide rule produced: gold anodized adjustable aluminum end braces, duplex 5/4-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides), plus additional blue stripes on the A and B scales, and massive 2 1/4″ wide body. Expanded W square root scales, for both the square root of x and 10x, 8 log log scales, and raised rubber bumpers to prevent cursor scraping, and to give the rule grip on a desktop. Body is fully alignable at the aluminum end-pieces, and provides finger grip areas on the slide for better movement. Cursor pops off (note the recess on the side bars) for easy cleaning, while retaining its alignment, a very handy feature! Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), expanded square scales, folded scales and scale over-ranges. Includes: Original box, case, original manual in Spanish, reprint manual in English, and accessory rule.
Scales include:
Front – T1, T2, K, A, DF, [ CF, B, CIF, CI, C, ] D, DI, S, ST, P
Back – LL03, LL02, LL01, LL00, W2 [ W2′, CI, L, C, W1′, ] W1, LL0, LL1, LL2, LL3
Stock: 4
USD $325
Class C (reduced from USD$375): Good condition. Some visible scale bleeding on one or both sides. Some dark spots or discoloration on case.
Considered to be the most advanced slide rule produced: gold anodized adjustable aluminum end braces, duplex 5/4-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides), plus additional blue stripes on the A and B scales, and massive 2 1/4″ wide body. Expanded W square root scales, for both the square root of x and 10x, 8 log log scales, and raised rubber bumpers to prevent cursor scraping, and to give the rule grip on a desktop. Body is fully alignable at the aluminum end-pieces, and provides finger grip areas on the slide for better movement. Cursor pops off (note the recess on the side bars) for easy cleaning, while retaining its alignment, a very handy feature! Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), expanded square scales, folded scales and scale over-ranges. Includes: Original box, case, original manual in Spanish, reprint manual in English, and accessory rule.
Scales include:
Front – T1, T2, K, A, DF, [ CF, B, CIF, CI, C, ] D, DI, S, ST, P
Back – LL03, LL02, LL01, LL00, W2 [ W2′, CI, L, C, W1′, ] W1, LL0, LL1, LL2, LL3
Stock: 8
USD $325
Class C (reduced from USD$375): Good condition. Some visible scale bleeding on one or both sides. Some dark spots or discoloration on case.
Considered to be the most advanced slide rule produced: gold anodized adjustable aluminum end braces, duplex 5/4-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides), plus additional blue stripes on the A and B scales, and massive 2 1/4″ wide body. Expanded W square root scales, for both the square root of x and 10x, 8 log log scales, and raised rubber bumpers to prevent cursor scraping, and to give the rule grip on a desktop. Body is fully alignable at the aluminum end-pieces, and provides finger grip areas on the slide for better movement. Cursor pops off (note the recess on the side bars) for easy cleaning, while retaining its alignment, a very handy feature! Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), expanded square scales, folded scales and scale over-ranges. Includes: Original box, case, original manual in Spanish, reprint manual in English, and accessory rule.
Scales include:
Front – T1, T2, K, A, DF, [ CF, B, CIF, CI, C, ] D, DI, S, ST, P
Back – LL03, LL02, LL01, LL00, W2 [ W2′, CI, L, C, W1′, ] W1, LL0, LL1, LL2, LL3
Stock: 2
USD $275
Class D (reduced from USD$325): Reasonable condition. Visible/pronounced scale bleeding on both sides, case may have considerable dark spots and/or discoloration.
Considered to be the most advanced slide rule produced: gold anodized adjustable aluminum end braces, duplex 5/4-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides), plus additional blue stripes on the A and B scales, and massive 2 1/4″ wide body. Expanded W square root scales, for both the square root of x and 10x, 8 log log scales, and raised rubber bumpers to prevent cursor scraping, and to give the rule grip on a desktop. Body is fully alignable at the aluminum end-pieces, and provides finger grip areas on the slide for better movement. Cursor pops off (note the recess on the side bars) for easy cleaning, while retaining its alignment, a very handy feature! Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), expanded square scales, folded scales and scale over-ranges. Includes: Original box, case, original manual in Spanish, reprint manual in English, and accessory rule.
Scales include:
Front – T1, T2, K, A, DF, [ CF, B, CIF, CI, C, ] D, DI, S, ST, P
Back – LL03, LL02, LL01, LL00, W2 [ W2′, CI, L, C, W1′, ] W1, LL0, LL1, LL2, LL3
Stock: 12
USD $275
Class D (reduced from USD$325): Reasonable condition. Visible/pronounced scale bleeding on both sides, case may have considerable dark spots and/or discoloration.
Considered to be the most advanced slide rule produced: gold anodized adjustable aluminum end braces, duplex 5/4-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides), plus additional blue stripes on the A and B scales, and massive 2 1/4″ wide body. Expanded W square root scales, for both the square root of x and 10x, 8 log log scales, and raised rubber bumpers to prevent cursor scraping, and to give the rule grip on a desktop. Body is fully alignable at the aluminum end-pieces, and provides finger grip areas on the slide for better movement. Cursor pops off (note the recess on the side bars) for easy cleaning, while retaining its alignment, a very handy feature! Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), expanded square scales, folded scales and scale over-ranges. Includes: Original box, case, original manual in Spanish, reprint manual in English, and accessory rule.
Scales include:
Front – T1, T2, K, A, DF, [ CF, B, CIF, CI, C, ] D, DI, S, ST, P
Back – LL03, LL02, LL01, LL00, W2 [ W2′, CI, L, C, W1′, ] W1, LL0, LL1, LL2, LL3
Stock: 3
USD $125
Class E: Poor condition. Extensive scale bleeding and discoloration on one or both sides. Case may have considerable dark spots and discoloration.
Considered to be the most advanced slide rule produced: gold anodized adjustable aluminum end braces, duplex 5/4-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides), plus additional blue stripes on the A and B scales, and massive 2 1/4″ wide body. Expanded W square root scales, for both the square root of x and 10x, 8 log log scales, and raised rubber bumpers to prevent cursor scraping, and to give the rule grip on a desktop. Body is fully alignable at the aluminum end-pieces, and provides finger grip areas on the slide for better movement. Cursor pops off (note the recess on the side bars) for easy cleaning, while retaining its alignment, a very handy feature! Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), expanded square scales, folded scales and scale over-ranges. Includes: Original box, case, original manual in Spanish, reprint manual in English, and accessory rule.
Scales include:
Front – T1, T2, K, A, DF, [ CF, B, CIF, CI, C, ] D, DI, S, ST, P
Back – LL03, LL02, LL01, LL00, W2 [ W2′, CI, L, C, W1′, ] W1, LL0, LL1, LL2, LL3
Stock: 1
USD $125
Class E: Poor condition. Extensive scale bleeding and discoloration on one or both sides. Case may have considerable dark spots and discoloration.
Considered to be the most advanced slide rule produced: gold anodized adjustable aluminum end braces, duplex 5/4-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides), plus additional blue stripes on the A and B scales, and massive 2 1/4″ wide body. Expanded W square root scales, for both the square root of x and 10x, 8 log log scales, and raised rubber bumpers to prevent cursor scraping, and to give the rule grip on a desktop. Body is fully alignable at the aluminum end-pieces, and provides finger grip areas on the slide for better movement. Cursor pops off (note the recess on the side bars) for easy cleaning, while retaining its alignment, a very handy feature! Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), expanded square scales, folded scales and scale over-ranges. Includes: Original box, case, original manual in Spanish, reprint manual in English, and accessory rule.
Scales include:
Front – T1, T2, K, A, DF, [ CF, B, CIF, CI, C, ] D, DI, S, ST, P
Back – LL03, LL02, LL01, LL00, W2 [ W2′, CI, L, C, W1′, ] W1, LL0, LL1, LL2, LL3
Stock: 2
USD $110
While the box is a little worn, the rule itself is in mint/new condition and is still in its factory sealed plastic. Includes original instruction manual and case.
Front – T, K, P, S, C, D, +3 other scales, L, LL1, LL2, LL3
Back – Blank
Stock: 1
USD $65
This Hemmi pocket rule is in new/mint condition, and is still in its factory plastic sealed bag.
Scales include:
Front – C, D, + 7 other scales
Back – Instructions and unit conversion data
Stock: 1
USD $35
This antique wooden rule features an imperial ruler along the top edge, and basic scales on the front. Based on its age, scales, and reference tables, this looks like an early architect’s rule for construction projects.
Scales include:
Front – A, B, CI, C, D, K
Back – Reference chart for various building materials
Stock: 1
USD $179
It is rare to find these rules, much less find them in working condition. This rule features 10 scales, an imperial ruler on the upper edge, and mechanical adding machine on the back. Comes with original case and stylus.
Scales include:
Front – L, K, A, B, CI, C, D, S, ST, T
Back – Addiator, unit conversion, and common formulae
Stock: 1
USD $195
Long before Samsung was trying to sneak a stylus into their smartphones, Faber Castell was already concealing them in their slide rules. This is a very rare surviving example of one of those rules, that features a small stylus that is concealed in the upper left corner of the rule, and can be slid out to operate the addiator integrated into the back of the rule. Rule features an imperial ruler on the upper edge, and a metric ruler on the lower edge.
Scales include:
Front – 7 scales (+ Cos, ST, T scales on the reverse side of the slide)
Back – Addiator and unit conversion instructions.
Stock: 1
USD $30
An intermediate rule, this 15 scale, single sided rule, features a metric ruler along the upper edge, and includes the original instructions (in French, désoler…)
Scales include:
Front – L, P, A, B, K, CI, C, D, LL3, LL2, LL1, ST, S, T, Xy
Back – Blank
Stock: 1
USD $35
This is a more basic rule that is more geared towards drafting and surveying. It features 12 scales (two along the lower vertical edge of the rule), and a metric ruler along the upper edge of the rule.
Scales include:
Front – Scale identification not clear, but it does include C, D, S, T, ST
Back – Reference formulae and data (in German)
Stock: 1
USD $25
This is a great rule for beginners, as it features a blue colored slide for easy reading, a reduced number of scales, and stand-off style feet on the reverse side for easy desktop use. It also includes an original instruction manual.
Scales include:
Front – T, K, A, B, CI, C, D, L, S, ST, LL1, LL2, LL3
Back – Blank
Stock: 1
USD $75
This is a rule designed more for beginners, and incorporates a variety of useful features. It includes metric rulers on both the upper and lower edges of the rule, however, the ruler on the lower edge places the “0” mark in the center of the rule with markings increasing outwards towards each end of the rule.
Scales include:
Front – K, A, B, BI, CI, C, D, DI, L, T2, T1, ST, S
Back – Unit conversion table, formula references, and usage instructions
Stock: 1
USD $85
This is a very unusual vintage wood rule from Nestler, which features a metric ruler along the upper edge of the rule, and two supplementary scales along the lower vertical edge, read out using a small lens fixed to the lower edge of the main cursor.
Scales include:
Front – Unsure on exact nomenclature of certain scales, but there are 9 scales including the two on lower edge of the ruler, and the following on the reverse side of the slide: S, S&T, T
Back – Constants and data tables (in German)
Stock: 1
USD $65
An advanced double sided slide rule, featuring an alternate color slide (light green – the color of minty freshness) for easier reading.
Scales include:
Front – CT, T, ST, DF, CF, CIF, CI, C, D, P, S, CS
Back – LL01, LL02, LL03, A, B, L, K, C, D, LL3, LL2, LL1
Stock: 1
USD $215
This is a single sided circular slide rule operated by using the two knobs on the top of the rule’s all metal casing. Some details on using these style of calculators can be found here. The Long Scale version of this calculator is specifically designed for use by engineers, draughtsman, and science students.
The designation of “long scale” (also some times called “magnum”) refers to this calculator being 1.5″ larger than the standard Fowlers Calculator, allowing for much finer gradation on the scales, and allowing calculations of four or five significant digits.
Stock: 1
USD $20
This is a combined instructional manual and workbook for learning the basic rule scales. It features a variety of exercises throughout the book, accompanied by large, easy to understand illustrations. This book has been partially filled out by a prior owner with a pencil, but is in excellent physical condition.
Printed in 1956, 208 pages, hard cover spiral bound.
Stock: 1
USD $30
While this manual was printed specifically for the Dietzgen 1735, it is equally useful in learning any advanced rule. This manual does not rely as heavily on diagrams, as it uses those initially to teach the use of the basic scales, however, it uses extensive text based explanations and exercises throughout the manual. Manual is in very good condition with no significant wear or discoloration to either the cover or pages.
Printed in 1946, 163 pages, heavy paper bound.
Stock: 1
USD $15
This is an early guide from Sun/Hemmi on how to use everything from their basic up to their more advanced rules. It includes some fold out diagrams for explaining scales, as well as diagrams and examples throughout to explain functions.
Printed in 1951, 107 pages, paper bound book.
Stock: 1
USD $10
This is an unusual guide that took using the slide rule as a guide to writing. While not a guide itself on how to use the slide rule, it seeks to teach writers, editors, and the like to write in a clearer, more concise manner such that their words serve a purpose – much like the slide rule helps an engineer structure their claculations.
Printed in 1947, 23 pages, spiral bound.
Stock: 1
USD $35
For a book that is more than 100 years old, this is in remarkably good condition; only minor wear to the corners, pages are in very good condition. Makes excellent use of diagrams and example problems to explain usage of the common rule scales.
Seventh Edition,1918, 100 pages, paper bound booklet.
Stock: 1
USD $25
Like all of Ditzgen’s documentation, this is a clear and easy to understand guide on how to use a slide rule, including its more advanced trig and log functions. It uses enlarged diagrams and sample problem sets (with answers) to walk students through using their rules. In excellent condition with very little wear or damage.
Printed in 1960, 106 pages, soft cover.
Stock: 1
USD $35
This was an optional learning guide for students more than a century ago, which entailed completing the reading and exercises in the book with directions to mail in the complete work for grading via correspondence! As a learning guide, it is quite comprehensive on using the basic scales of a slide rule, and uses for clear and thorough illustrations throughout the book. The book is in excellent shape, minus the lone pencil marking on the front cover indicating it is “optional.”
First Edition, 1879 (you read the correctly!), 59 pages, paper bound.
Stock: 1
USD $10
This is primarily a work book that already has some of the sample problems filled in. It is a fairly easy to follow guide with some diagrams for ease of teaching. Overall condition is middling, with the corners showing a good deal of wear, and the ring-bound covers not in good condition. It also has pencil markings on about a third of the pages.
Second printing, 1947, 208 pages, spiral bound soft cover.
Stock: 1
USD $30
This is a beginner’s guide to using the C, D, A, B, CI, CF, and DF scales of a rule. It is rich with diagrams, and features some basic examples and problems to follow along with. The book is physically in good condition with minimal wear, but does have some stamps from its previous library owner, and some minor scrawling on a few pages.
Second Printing, 1965, 96pages, hard cover with dust jacket and plastic covering.
Stock: 1
USD $15
This is a comprehensive and easy to understand guide on using the abacus. It features very clear usage diagrams, along with a variety of practice problems and calculations, including an answer key at the back. In excellent condition with almost no signs of wear.
Fourth Printing, 1968, 64 pages, soft cover
Stock: 1
USD $25
This is a very basic introductory guide to the slide rule, that uses a combination of diagrams and tabular data to explain rudimentary use of the slide rule. This book is in good condition, with some wear to the cover and dust jacket, pages are in good condition.
Seventh Edition, 1970, 112 pages, hardbound with dust jacket.
Stock: 1
USD $20
Written with students in mind (this one has some notes from said students), this is a beginner’s guide to the core functions of using a slide rule. Features some drawings/diagrams, as well as a variety of tables and mathematical examples.
Third Printing, 1968, 141 pages, soft-cover
Stock: 1
USD $25
A text heavy document, this book provides a great deal of historical information on the slide rule (pre-1930, obviously), it also provides mathematical examples and explanations of completing certain calculations. Pages in very good condition, moderate-to-high wear on the spine and corners.
Second Printing, 1930, 220 pages, hardbound
Stock: 1
USD $40
A comprehensive guide to slide rule usage, this book includes a variety of diagrams and walk-throughs on calculations. It also includes a section of data tables for conversion, and logarithms.
Third Edition, 1943, 219 pages, hard bound,
Stock: 1
USD $50
If the title of the book did not give it away, this book pre-dates most other guides. It does not make use of any diagrams, only text. Does appear to have the signature of the original owner on the front cover page.
Published 1849, 276 pages, hard bound, wear on the edges of the cover and top/bottom of spine, some discoloration on the outer page edges.
Stock: 1
USD $35
This is a self-teaching instructional manual for the Dietzgen Deci Trig Log Log slide rule.
This book is carefully sealed in a plastic sleeve, and was not possible to confirm year of publication or page count. It is in very good condition with no color fading to the cover, and only minor wear around the edges.
Stock: 1
USD $30
This is a supplementary manual meant to accompany the N4081 Log Log Duplex Decitrig Slide Rule, and explains the application of the plan and hyperbolic scales to vector calculations for the Log Log Duplex Vector N4083 slide rule from K&E.
Fiendishly well sealed in a protective plastic sleeve, it is in good condition, was published during a year in the 20th century, and is constituted of a certain quantity of pages.
Stock: 1
USD $40
What happens when a mathematician and civil engineer decide to write a book? You get a comprehensive and easy to use reference for using a slide rule.
Second Edition, Second Printing 1951, 95 pages, hard cover, in excellent condition. No wear on the spine or pages, only slight bending on the corners of the cover.
Stock: 1
USD $30
The collegiate guide to getting familiar with your most trusted partner: your slide rule. Uses detailed diagrams to explain slide rule functions, and includes exercises and solutions.
Reprinted 1950, 147 pages, softcover pocket book, some wear to the cover and corners, pages in good condition.
Stock: 1
USD $40
A complete listing of K&E’s product lineup for the 1939 production year, which was certainly quite a year globally. Includes a product price list affixed to the inside rear cover.
581 pages, leather hardbound, catalog in good condition, attached product list has fraying/damage to some of the pages.
Stock: 1
USD $35
A rare snapshot of history, this catalog of Drafting, Reproduction and Surveying Equipment and Materials, Slide Rules, and Measuring Tapes, is from 1954. Includes detailed sketches of older equipment, some in partial color.
475 pages, hardbound with minor wear to books edges. Pages in excellent condition.
Stock: 1
USD $40
This hard-bound catalog of Dietzgen’s various wares dates to 1928, and includes a sample of drawing and tracing papers on the interior cover. An additional price list for the 1929 year is included fixed to the interior of the rear cover.
496 pages, in very good condition with no significant wear to the cover, spine or pages.
Stock: 1
USD $40
Provides an overview of basic slide rule functions, as well as specific instructions for electrical, chemical, and trig functions on specialized rules. Has a separate section for less common rule types (circular, cylindrical, watches, etc). Includes exercises and answer key.
Revised Edition, 1972, 181 pages, hard-cover with dust jacket, in very good condition. Pages in excellent shape with no discoloration or wear.
Stock: 1
USD $40
A hard cover but still highly portable, this is a very early how-to guide on using the slide rule. Does include drawings and detailed explanations.
General Edition, 1913, 127 pages. In very good condition, no damage to pages or cover, slight folding of cover at the corners.
Stock: 1
USD $30
Convenient pocket sized guide for enhanced slide-rule based mathematical learning, features easy to understand diagrams, sample problems, and an answer key at the back of the book is included.
First edition, 1966, 96 pages. Has ink damage on the front cover, and the cover and spine have moderate wear. Pages are all intact and in good condition.
Stock: 1
USD $40
This softcover pocket book is a complete guide on how to use and understand a slide rule, and includes easy to follow diagrams. Published 1966 by Bantam Unifact books, 139 pages. In good condition, some wear on the covers, spine not broken in or creased.
Stock: 1
USD $25
Highly adjustable and with the high build quality expected from Nestler, is this brand new compass. Comes with a spare point for added longevity/functionality.
Stock: 1
USD $15
Provided in the most seductive of all box colors (blue), is this Pickett drafting set. In addition to the compass, it also includes extra leads, a sharpener, and drafting pencil.
Stock: 2
USD $25
A double sided slide chart used for frequency calculations. Includes original instruction sheet in German.
Stock: 1
USD $25
This star finder and identifier is more versatile than many others, as it comes with 10 different latitude overlays ensuring this star-finder is useable in many different areas.
Includes manual, 10 latitude overlays, double-sided circular map/chart, and protractor.
Stock: 1
USD $25
Made from two durable acrylic discs with one half having a star map, and the other having the field of view and time of day, this star finder is easy to use and very popular.
Stock: 1
USD $35
Clear and easy to use, this star finder has two concentric rings on one side for lining up the chart to your surroundings, and easy to understand directions on the reverse side.
Stock: 2
USD $25
This chart is configured for 30-40 degrees in the southern hemisphere. This chart not only helps identify which stars are visible at any hour and day, but also shows this information thousands of years into the past, the present, and well into the future.
Stock: 1
USD $150
Don’t be caught in the cockpit without this device! Set comes complete with case, manual, multiple charts, and double sided circular slide rule.
Provides arithmetic and vector solutions for for aircraft speeds of 90 to 2 000 knots, with consideration of errors due to aircraft acceleration. Dead reckoning capability of a plotting board.
Stock: 1
USD $15
If you’re still refusing to use the metric system, and don’t want to do your calculations using fractional lengths of football fields, then this circular slide chart will be very useful. On the inner ring it provides calcualtions in both fractional and decimal quantities.
Stock: 1
USD $35
This ruler uses temperature responsive liquid crystals to read-out room temperature in C/F. It also features metric and imperial measures on the upper and lower edges, and a slide in the center for completing metric/imperial conversions for mass, volume, and distance.
Stock: 1
USD $15
This small pocket measure comes in its original leather carrying case, and uses a small toothed rotating wheel to measure inches/feet as it is rolled, and read-out on the moving dial of the tool. Each side of the tool features multiple different scales.
Stock: 1
USD $15
The Sterling “Add-It” machine uses an included stylus to allow a user to add and subtract. Usage directions printed on the front of the device.
Stock: 1
USD $249
This is a very rare 4″ pocket circular rule, that comes with both the original factory box and manual in very good condition.
Scales include: A, C, CI, Log, Log-Log, Binary, S,
Stock: 1
USD $50
Made under the joint marques fo KOH-I-NOOR and Graphoplex is this X2. Features a metric ruler along the top edge and original leather case in good condition.
Scales include:
Front – a, b, b^2, B, B^2, B^3, L, LL1, LL2, LL3, cos, S, T, S&T
Back – Blank
Stock: 1
USD $40
Still in good condition, this rule has no scale bleeding and moves smoothly. Features imperial and metric rulers on the upperand lower edges of the rule, back features standard unit conversions.
Scales include:
Front – A, B, C, D, K, CI, S, L, T
Back – Unit conversion chart
Stock: 1
USD $35
Made in Japan, this bamboo duplex pocket rule has 13 scales.
Scales include:
Front – C, D, L, CF, DF, CI
Back – A, B, C, D, K, S, T
Stock: 1
USD $145
This Staedtler rule features metal cursor end caps, and metal braces with supporting ridges to allow for desktop use of the rule. Includes a new leather case engraved with the Sphere Research Logo.
Scales include:
Front – A, B, C, D, L, K, LL1, LL2, LL3, LL01, LL02, LL03
Back – C, D, P, S, T, CF, CI, DF, CS, CT, ST, CIF
Stock: 1
USD $45
A basic plastic body simple pocket rule with rulers on the upper and lower edges of the rule. Comes in original factory case and box.
Scales include:
Front – A, B, C, D,K, CI
Back – Blank
Stock: 1
USD $15
This is a very basic rule made from a wood body and laminated plastic for the scales. It looks like it was used for instructional or educational purposes, and was produced in bulk. The scales are starting to delaminate, making some of the numbers harder to read. Definitely an unusual piece of history.
Scales include:
Front – A, B, C, D,K, CI
Back – Blank
Stock: 1
USD $39
New and in mint condition, made in Czechoslovakia. A great beginner and student rule.
Basic Rietz format rule (has over-range scale extensions for easier operation) with added reference features. It has a black/red self-documenting scale arrangement and pale yellow slide. The slide reverse has trig (S, ST, T) scales, and the back has a treasure trove of useful data and factors. It has a slightly magnifying multi-line simplex cursor design that does area of a circle, plus some other interesting stuff like horsepower conversion. These are beautifully made rules, very well constructed. We will include basic instruction reprints, as these came bulk packed with with no manuals.
Stock: LOTS!
USD $129
An outstanding and attractive rule from Hope Slide Rule Manufacturing Co. in Japan, these rules are inmint condition, complete with plastic white/green 2-part case and an English factory manual.
Perfect sets of a very advanced Log Log rule with blue accent stripes on primary scales, RED inverse scale markings, plus self-documenting on the right hand side. Has 4 trig scales (T1, T2, ST and S), PLUS P pythagorean scale, an exceptionally rich scale set and excellent user features.
White plastic body and end braces with engraved and filled scales in red/black. Folded scales are at 3, with Pi also marked. Front ABCD scales also have over-range at both ends.
Front – LL01, LL02, LL03, A, [ B, L, K, C, ] D, LL3, LL2, LL1
Back – T2, T1, ST, DF, [ CF, CIF, CI, C, ] D, P, S
Stock: LOTS!
USD $45
An all-plastic rule, the Omega 797 features 22 scales and comes with the original factory box and manual. It also features rubber stand-off feet on both side of the rule for easy desktop operation.
Scales are as follows:
Front – T, ST, DF, CF, CIF, CI, C, D, P, S
Back – LL01, LL02, LL03, A, B, L, K, C, D, LL3, LL2, LL1
Stock: 1
USD $165
This all plastic rule features 25 scales, and has rubberized feet to keep the rule fixed in place for desktop use. This rule includes the rule, original case, and conversion/formula table.
Scales are as follows:
Front – LL01, LL02, LL03, DF, CF, CIF, K, CI, C, D, LL3, LL2, LL1
Back – LL00, L, T>45, A, B, T<45, SRT, S, C, D, P, DI, LL0
Stock: 1
USD $45
This full size rule features 25 scales, and includes the original case and included formula/data rule (which includes common geometric formulas, and unit conversions).
Scales are as follows:
Front – Th, Sh2, Sh1, A, B, T<45, T<45, ST, S, D, DI, K
Back – LL01, LL02, LL03, DF, CF, CIF, L, CI, C, D, LL3, LL2, LL1
Stock: 1
USD $129
Featuring the Nestler green central slide, this rule has no scale bleeding and is in excellent condition. Features an imperial ruler along the upper edge fo the rule.
Scales include:
Front – X, X2, X3, 1/x, SIN, COS, LL1, LL2, LL3
Back – Blank
Stock: 1
USD $55
This full size rule features 13 scales, with color contrasted markings for easy reading. There is a mteric ruler along the top edge of the rule, and commonly used formulas and data conversion tables on the reverse side of the rule.
Scales are as follows:
Front – L, K, A, B, CI, C, D, P, S, T, LL1, LL2, LL3
Back – Formulas, data conversion tables
Stock: 1
USD $30
This single sided rule is suitable for the mathematician on the go and features clear plastic edging on the upper and lower ruler edges with imperial and metric rulers.
Scales include:
Front – X, XZ, X2, X3, X 2/Z, 1/X, SIN, TG, ROOT (1-X2), LGX, E^X, E^0.1X, E^0.01X
Back – Blank
Stock: 1
USD $195
This bamboo rule is still in its original factory sealed plastic, however, the rule does show signs of discoloration and marking from having been stored for so long. The case is also fairly worn and has lost its finish in multiple areas. Ruler in inches along the upper edge of the rule.
Scales include the following:
Front – A, C, D, K, CF, DF, CI, L, TI1, TI2, SI1
Back – Blank
Stock: 1
USD $125
Still in its original plastic sleeve and unopened, is this Hemmi 60 pocket rule. Features metric and imperial rulers on the upper/lower edges of the rule.
10 scales.
Stock: 1
USD $95
This early Hemmi pocket rule features a magnifying cursor, and an imperial unit ruler along the top edge of the rule.
Scales include:
Front – A, B, C, D, CI, S, L, T
Back – Blank
Stock: 1
USD $129
This advanced Hemmi pocket rule features a metric ruler along the upper edge, and 13 scales (5 regular sacles unmarked).
Scales include:
Front – P, S, T, K, L, LL1, LL2, LL3 (+5 unmarked scales)
Back – Blank
Stock: 1
USD $35
This seven scale pocket rule features an unusual cursor design, with a bulkier metal frame on only three sides of the cursor. Imperial/metric ruler on the upper and lower edges of the rule. As is true of most Hemmi rules, this is a bamboo rule.
Scales include:
Front – A, B, C, D, S, L, T
Back – Blank
Stock: 1
USD $85
This bamboo, eight scale, pocket rule features a metric ruler on the upper edge of the rule. Includes original box, manual, and case.
Scales include:
Front – A, B, C, CI, D, S, L, T
Back – Blank
Stock: 1
USD $65
This bamboo, nine scale, full size rule features imperial and metric rulers on the upper and lower edges of the rule. Includes original box, manual, and case.
Scales include:
Front – L, D, 360, C, D, A, S, S&T, T
Back – Formulas, data tables
Stock: 1
USD $225
Don’t let the box fool you, this rule is in excellent shape and is still in its sealed factory plastic. It features 24 scales, and is a rule for advanced users.
Scales include:
Front – L, F, K, A, B, K’, CI, C, D, LL3, LL2, LL1
Back – CL, SL, M, TL, R, ST, T, S, C, D, DI, SIN/COS
Stock: 1
USD $95
This rule is new and still in its factory sealed bag, the case is also in excellent condition with no staining or wear. As features, this rule has 15 scales, a metric ruler along the upper edge of the rule, and formulas and data conversion tables on the back.
Scales include:
Front – T, K, A, B, BI, CI, C, D, P, S, L, LL0, LL1, LL2, LL3
Back – Formulas and data tables
Stock: 1
USD $85
This all-metal 23-scale rule has some unique features. The reverse side of the rule features a split scale, with instructions outlined in the centre of the rule, and positive values read on the left end of the scale, and negative values on the right.
Scales are as follows:
Front – ^-3, ^-3, ^-3, L, T, T, ST< S, CI, C, D, ^-2, ^-2
Back – C, D, T’, T’, ST’, S’, DN, RN-DZ, ^-2, ^-3
Stock: 1
USD $75
This rare Faber Castell wood rule features 7 scales on the rule proper, and metric/imperial rulers on the upper and lower edges fo the rule.
Scales are as follows:
Front – 7 Scales
Back – Reference and conversion references (in German)
Stock: 1
USD $59
This rare Faber Castell wood rule features 8 scales on the rule proper, a metric ruler on the upper edge of the rule, and another logarithmic reference on the lower edge of the rule where you would normally find an imperial ruler. There is some separation beginning between the plastic and wood body on the top left of the rule.
Scales are as follows:
Front – 7 Scales
Back – Reference and conversion references (in German)
Stock: 1
USD $165
This rare 13-scale pocket rule features a metric ruler along the top edge, and an imperial ruler on the reverse side of the rule. This is an all plastic rule, and comes with the original instruction sheet in German.
Scales are as follows:
Front – Metric ruler, L, K, A, B, CI, C, D, F, S, T, LL1, LL2, LL3
Back – Imperial ruler
Stock: 1
USD $30
This 13-scale full size rule features large, color contrasted scale for easy reading, and operating instructions printed on the reverse side of the rule. Includes the original case and operating instructions (in German).
Scales are as follows:
Front – A, DF, CF, CIF, CI, C, D, kW, k
Back – Z’, N’, Z, N, instructions
Stock: 1
USD $35
This 13-scale full size rule features large, color contrasted scale for easy reading, and operating instructions printed on the reverse side of the rule. Includes the original case, box, and operating instructions (in German).
Scales are as follows:
Front – A, DF, CF, CIF, CI, C, D, kW, k
Back – Z’, N’, Z, N, instructions
Stock: 1
USD $325
This oversize rule measures approx 56.5cm, and features a metric ruler long the upper edge of the rule. The lower edge of the rule features the S&T scales, readable using the wraparound cursor on the body of the rule.
Scales are as follows:
Front – A, B, CI, C, D, S, T. LL1. LL2, LL3
Back – Operating instructions (in german), formulas, conversion tables
Stock: 1
USD $90
This oversize rule measures approx 56.5cm, and features an imperial ruler long the upper edge of the rule, and a metric ruler along the lower square edge of the rule.
Scales are as follows:
Front – A, B, CI, C, D, S, ST, T
Back – Operating instructions, formulas, conversion tables
Stock: 1
USD $25
This combination slide rule/ruler comes with the original box and case. The box and case are not in great condition, but the rule has held up well.
Scales are as follows:
Front – A, C, D, K, CF, DF, CI, S, B, L, T
Back – 6″ / 13cm ruler
Stock: 1
USD $49
A single-sided rule for the beginner pocket rule user.
Scales are as follows:
Front – C, D, L, CF, DF, CI
Back – Blank
Stock: 1
USD $45
This 6″ K&E simplex rule features 9 scales, and both imperial and metric rulers on the reverse side.
Scales are as follows:
Front – A, B, C, D, K, CI, S, L, T
Back – Imperial/metric rulers
Stock: 1
USD $25
This 9 row, 5 bead abacus is made from brass, and comes with a granite support base. The abacus is not fixed in place to the base, and the base measures approximately 3.5″ long, and 2″ wide.
Stock: 1
USD $15
This 21 row, 4 bead soroban has a wood frame and plastic beads. It measures approximately 12″ long, and 2.5″ wide.
Stock: 1
USD $30
This 9 row, 5 bead abacus, is made from brass and hard mounted to a granite base. It measures approximately 6″ long, and 3.5″ wide.
Stock: 1
Sphere Research Corporation