USD $49
An entry level rule good for students, single sided with contrasting mint green slide. Rule is new and in original packaging, with user manual.
(9 Scales)
Front -K, S, A, B, CI, C, D, T, L
Back – Blank
Stock: 1
USD $195
13″/10.5″ Duplex Log Log Slide Rule
This is the late model of this rule which includes metric and imperial rulers on the upper and lower edges, but does not have the green contrast scales normally found on the FC rules. Includes accessory ruler, original manual (in German), and display case.
(22 scales, 2 rulers)
Front – cm, T1, T2, A, [ B, BI, CI, C, ] D, P, S, inches
Back – LL03, LL02, LL01, K [ K’, L, ST, CF] DF, LL1, LL2, LL3
Stock: 1
USD $495
Excellent condition, no visible scale bleeding, minimal/no marking or discoloration to display 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: 1
USD $265
This is a new and complete box set for the Versalog 341-3010 full size rule originally made by Sun / Hemmi. Rules are marked as being from Post, Hughes Owens, or GeoTec, but all bear the original Hemmi manufacturing mark. Boxes are heavily distressed.
Includes rule, case, and user manual.
(23 scales)
Front: LL/1, LL/2, LL/3, TT, SecT / ST, Cos / S, C, D, LL3, LL2, LL1
Back: LL0, LL/0, K, DF, CF, CIF, CI, C, D, R1, R2, L
Stock: 2
USD $265
10″, Engineering Versalog Slide Rule
We get only a few sets that are well cared for, these is in excellent condition. The rule and case are both free of marks, and ae clean and bright.
Laminated bamboo construction, self lubricating design.
Wears very well, and slides smoothly under all conditions. This is the classic high end slide rule from POST.
(23 Scales)
Front: L, LL/1 (e-0.01<-0.1), LL/2 (e-0.1<-1.0), LL/3 (e-1.0<-10), [ T, SRT, Cos/S, C, ] D, LL3 (e+1>10), LL2 (e+0.1>1.0), LL1 (e+.01>.1).
Back: LL/0 (e-.001<-.01), K, DF, [ CF, CIF, CI, C, ] D, R1, R2, LL0 (e+.001>.01)
Stock: 1
USD $69
11″/10″ Full Size Slide Rule
The best known bamboo Mannheim rule offered by POST, with reversible slide, formulas and conversions on reverse side. White laminate, Sun/Hemmi Japanese bamboo construction, engraved scales in blue and red. Sealed in original packaging, includes two part plastic case and instruction manual.
(9 Scales)
Front – A, [ B, CI, C, ] D, K
Back – Formulas and conversions,
reverse of slide is S, L, T
Stock: 2
USD $130
11″/10″ Full Size Slide Rule
The nicest Hemmi bamboo Mannheim rule offered by POST, with reversible slide, formulas and conversions on reverse side, side rulers in inches and cm. White laminate, Sun/Hemmi Japanese bamboo construction, engraved scales in blue and red. Rule condition is excellent, with only good condition cardboard box cases, all have marks, sticker residue or rubbed paint areas.
(9 Scales, 2 Rulers)
Front – inch / A, [ B, CI, C, ] D, K | cm
Back – Formulas and conversions, reverse of slide is S, L, T
Stock: 2
USD $225
13″/10.5″ Duplex Log Log Slide Rule
One of the nicer plastic body rules ever made, with anodized adjustable aluminum end braces, duplex 5/3-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides). This rule also has 6 log log scales, and paired K scales for 3 decade operations. Body is fully alignable at the aluminum end-pieces.
Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), BI scale, dual Tangent scales (T1/T2), folded scales and scale over-ranges.
(24 scales, 8 cursor lines)
Front – L, T1, T2, A, [ B, BI, CI, C, ] D, ST, S, P
Back – LL03, LL02, LL01, K [ K’, C, CIF, CF, ] DF, LL1, LL2, LL3
Stock: 1
USD $159
Exceptionally useful late version Ivorite body rule from K+E (68-1565), with mint gold-embossed, black sewn leather case. This very late (1966 scale copyright) modern style rule has the unique inch/cm converter scales and rulers on the rear side. A very attractive and useful rule, with dual Sq scales, trig and folded scales, plus the metric conversion/rulers/log calculator on the rear face.
(16 Scales, 2 Rulers)
Front – Sq1, Sq2, DF, [ CF, T, SRT, S, CI, C, ] D, A, K
Back – number, [ cm, (factors and data) inch, ] Logarithm
Stock: 1
USD $125
This is a bamboo core, advanced rule ideal for the engineer, mad scientist, or afficionado. Includes a secondary rule with common formulas and conversions.
(22 scales)
Front – LL01, K, A, B, T<45, T>45, ST S, D, DI, LL1
Back – LL02, LL03, DF, CF, CIF, L, CI, C, D, LL3, LL2
Stock: 1
USD $115
Hemmi 251 Bamboo Full Size Slide Rule (new/mint)
(19 scales)
Front – L, DF, CF, CIF, CI, C, D, LL3, LL2, LL1
Back – K, A, B, T, S, ST, C, D, DI
Stock: 1
USD $45
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
Stock: 1
USD $245
Hemmi 260 Full Bamboo Size Rule (new/mint)
(25 Scales)
Front – LL/1, LL/2, LL/3, DF, CF, CIF, CI, C, D, LL3, LL2, LL1
Back – LL/O, LL0, K, A, B, T, S, ST, C, D, DI, P, L
Stock: 1
USD $225
This is an extremely rare, early model K&E rule in it’s original box, complete with leather case, care instructions, and user manual. 20″ rule, with rulers on both the upper and lower edges.
(9 Scales, 2 rulers)
Front – A, B, CO, C, D, K, [S, L, T]
Back – Factors
Stock: 1
USD $159
M.H. Mear Gas Flow Calculator Circular Rule (new/mint)
Stock: 1
USD $59
Coast Navigation Simex Course Converter (new/mint)
Stock: 1
USD $85
Fearns W25 Castings and Forging Weight Calculator Circular Rule (new/mint)
Stock: 1
USD $85
Fearns-Mear Machining Time Calculator Circular Rule (new/mint)
Stock: 2
USD $159
M.H. Mears Pipe Flow Calculator for Liquids & Gases (new/mint)
Stock: 1
USD $125
Beautiful miniature pocket bamboo rule with framed magnifying glass lens and embossed leather clip case. Mint condition NEW boxed set with manual!
Has inch scale side ruler, framed magnifying glass cursor, reversible slide with 3 additional scales. A very attractive and hard to find rule, this style is always in high demand (because of the light weight and clip case), but hard to locate in good condition and an unmarked case.
Made by Hemmi in Japan.
(8 Scales and 4 inch side ruler)
Front inch – A, [ B, CI, C, ] D
Reverse – [ S, L, T ]
Stock: 1
USD $135
Concise No. 380 Radio Converter Circular Rule (new/mint), includes case and instruction manual.
Stock: 2
USD $85
Earns W28 Steelwork Weight Calculator Circular Slide Rule
Stock: 1
USD $59
Full size rule, new/mint condition, features blue/white contrast markings on the slide, and red/black etched markings on the rule for easy reading.
(23 Scales, 7 cursor lines)
Front – T1, T2, DF, CF, CIF, S, C, D, (P), S, ST
Back – LL0, L, K, A, B, BI, CI, C, D, LL3, LL2, LL1
Stock: 1
USD $95
Nestler’s powerhouse late production over-sized duplex rule. BRAND NEW rule, with 2 part plastic case, manual, accessory ruler and factory box. Has normal and folded basic scales (at 2.7), expanded trig scales, split square root scales, Pythagorean scale, 8 log log scales, and a 4/2 line cursor. Has body supports with skid bumpers (to allow flat operation without damaging the cursor), and a pale green stripe on the entire slide (both sides), and black filled/ engraved scales with red digits on some scales.
An excellent full sized Log Log rule, the top of the line from Nestler. All scales are self documenting on the right hand side.
(28 Scales, 4/2 Cursor Lines) (RH)
Front – LL00, LL01, LL02, LL03, DF [ DF, CIF, CI, C ] D, LL3, LL2, LL1, LL0
Reverse – P, S, T1, T2, A [ B, K, CI, C ] D, R1, R2, L, ST
Stock: 1
USD $69
K+E Ivorite Pocket Rule
6″/5″ Pocket Slide Rule
A commerce oriented simplex pocket rule with late unbreakable cursor. This series is the replacement for the earlier 4097 pocket series, which was a very fragile Xylonite design, these are quite rugged, and much nicer in appearance.
(6 Scales)
Front – DF, [ CF, CI, C, ] D, L
Back – Blank
Stock: 1
USD $65
Jakar 88 College Duplex Full Size Rule (includes support ruler), designed for students, engineers, architects and draughtsmen.
(22 Scales)
Front – LL1, LL2, LL3, DF, CF, CIF, CI, C, D, L, K
Back – T1, T2, A, B, BI, CI, C, D, P, S, ST
Stock: 1
USD $50
Jakar 66 Electro Slide Full Size Simplex Rule (metric ruler on top edge), designed for students, engineers, architects and draughtsmen.
(13 Scales)
Front – K, E, A, B, CI, CI, D, LL3, LL2, L [S, ST, T]
Back – Blank
Stock: 1
USD $125
5.5″ Circular Aviation Slide Rule
Constructed with one rotating film disk, and rotating cursor on each side. A very sophisticated and beautiful flight computer for doing altitude, pressure, wind drift, time, temperature, and fuel problems.
The rule gives simultaneous solutions in both metric and US/Imperial units, without being cluttered or hard to interpret, an outstanding mechanical and artistic design. Still in demand today among many pilots, but very hard to find.
Made of ‘Aristopal’, comes complete with zippered leather pouch. We have had many requests for this rule from all over the world, this set is in very good condtion, except for a few case scuffs.
Stock: 1
USD $95
Faber Castell 52/82 Full Size Duplex (NIB), includes manual and supplementary ruler (in German)
(20 Scales, 4/2 Cursor Lines)
Front – A, DF, CF, CIF, CI, C, D, K [K|Z, T, P%, T, Z]
Back – L, T1, T2,S, CI, C, D, S, ST
Stock: 1
USD $110
Faber Castell 52/82 Full Size Duplex (NIB), includes manual and supplementary ruler (in German)
(20 Scales, 3 Cursor Lines)
Front – L, K, A, B, CI, C, D, LL1, LL2, LL3
Back – T1, T2, DF, CF, CIF, C, D, S, ST, P
Stock: 1
USD $275
5.5″ Circular Aviation Slide Rule
Constructed with one rotating film disk, and rotating cursor on each side. A very sophisticated and beautiful flight computer for doing altitude, pressure, wind drift, time, temperature, and fuel problems.
The rule gives simultaneous solutions in both metric and US/Imperial units, without being cluttered or hard to interpret, an outstanding mechanical and artistic design. Still in demand today among many pilots, but very hard to find.
Made of ‘Aristopal’, comes complete with zippered leather pouch. We have had many requests for this rule from all over the world, this are the first 618’s we have ever had available for sale, all in excellent condition. The similar 617 has an additional rotating wind arrow on the back face, not present on these models. The earlier 616 does not have the red reciprocal degrees printed on the rear compass rose, or the wind arrow.
(22 scales on front, Wind scales on rear)
Stock: 1
USD $95
Fearns A8 Metric Weight Converter, includes case and manual, one side converts imperial to metric, and the other metric to imperial.
Stock: 1
USD $69
Concise Type E Pocket Circular Slide Rule w/Conversion Tables, includes original manual.
Scales: D, C, CI, A, K
Stock: 1
USD $75
6″/5″ Aristo Studio Pocket Slide Rules
NIB high end log log format rule, and original inspection certificate. Has a slightly magnifying 6 line cursor, CF/C and B/C scale yellow color stripes. Self-documenting, two-color scales, including folded, log log, P (pythagorean) and decimal trig scales.
Despite the high scale density, and small size, the scales are very readable and finely divided. This is one of Aristo’s most advanced pocket rules, and is beautifully designed and built. A wonderful compact log log plastic body pocket rule, very seldom seen in North America, and extremely powerful.
(Incredible 23 Scales!)
Front – ST, T1, T2, DF, [ CF, CIF, CI, C, ] D, P, S
Back – LL01, LL02, LL03, A, [ B, L, K, C, ] D, LL3, LL2, LL1
Stock: 1
USD $125
Staedtler Mars 544 DLL, Full Size Duplex (NIB)
(23 Scales, 4/4 Cursor Lines)
Front – T1, T2, A, B, BI, CI, C, D, (P), S, ST
Reverse – LL1, LL2, LL3, DF, CF, CIF, CI, C, D, K, L, LL0
Stock: 1
USD $119
10″ Logarex/Koh-I-Noor Darmstadt Slide Rule VERY LATE MODEL, made in Czechoslovakia. Powerful, brand new full sized rule with front and back cm/inch edge rulers, smooth black scales, 3 log log scales on the slide reverse, pythagorean and trig scales, and 4 line cursor, and dual reverse side body cursors. Unusually marked, this rule contains ONLY scale equivalents, no arbitrary letters. Has a soft black padded leatherette case with top flap, and the name of the UK distributor for Logarex (Hellerman) embossed on one side. A very powerful and well-designed rule, but uncommon in North America. Like Pickett rules, this is lithographically made, not engraved, and has a shiny top coating for protection of the printed scales. A very nice desk rule to use for many purposes, thanks to the dual rulers. The 4 page Hellerman basic instructions are included.
(14 Scales, 4 cursor lines, 2 Rulers) (RH)
FRONT- cm/ log, sq rt(1-X2), X3, X2, [ X2, 1/X, X, ] X, sin, tg, s-t
BACK- inch/ [ e0.01X, e0.1X, eX ] Factors on the body area
Stock: 27
USD $65
A visually beautiful rule, complete with 2 part plastic case and factory box. The 544A features the trademark S/M blue slide and body braces, multi-line (5 line) cursor, plus two color (red/black) scale markings, and folded scales. The rule is self documenting on the right hand side for all scales. Staedtler-Mars rules are highly requested but quite uncommon in North America, and are very well made designs. Attractive blue slide and body braces, complement the bright blue and white two part plastic case. The folded scales are especially useful for mark-up/discount calculations, and a center index is well marked for this. The ‘invisible brace’ style with braces on the back gives the rule a very clean European look from the front.
Blank on the reverse side. These were still sealed in a factory bulk pack, so everything is in mint condition. We have included reprints of the S/M consolidated rule instructions because these came factory packed with no instructions.
(8 Scales, 5 Cursor Lines) (RH)
Front – K, DF, [ CF, CIF, CI, C, ] D, A
Back – Blank
Stock: 7
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 $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!
Sphere Research Corporation