Other Rules

Staedtler Mars 544-28 – Full Size Rule
Staedtler Mars 544-28 – Full Size Rule

Staedtler Mars 544-28 – Full Size Rule

USD $175

This 28 scale rule is not for the faint of heart!  It features metal end braces, a high contrast green slider for easier reading, and lack and red scales.  This is for the mathematical enthusiast, but the kind of enthusiast that needs a lot more computing power than something more rudimentary.

Scales include:
Front – LL00, LL01, LL02, LL03, DF, CF, CIF, CI, C, D, LL3, LL2, LL1, LL0
Back – P, S, T1, T2, A, B, K, CI, C, D, R1, R2, L, ST

Stock: 1

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Post / Hemmi 1447 – Full Size Rule
Post / Hemmi 1447 – Full Size Rule

Post / Hemmi 1447 – Full Size Rule

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

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Hemmi / Teledyne Post Versatrig 44CA-500 – Full Size Rule
Hemmi / Teledyne Post Versatrig 44CA-500 – Full Size Rule

Hemmi / Teledyne Post Versatrig 44CA-500 – Full Size Rule

USD $165

17 scale full sized duplex trig bamboo rule with framed glass cursor and a Sphere Research nylon case.  Has folded CF and CIF scales, split square root (R) scales, plus DI and 3 dual trig scales. A very attractive and hard to find rule, notably a transitional rule marked as both Teledyne and Post.  As with all bamboo body rules from Post or Teledyne Post, they are actually made by Hemmi in Japan.

(17 Scales)
Front – K, DF, [ CF, CIF, CI, C, ] D, R1, R2

Back – L, A, [ T, SecT/ST, Cos/S, C, ] D, DI

Stock: 1

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UTO 503 – Full Size Rule
UTO 503 – Full Size Rule

UTO 503 – Full Size Rule

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

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UTO No. 1 – Full Size Rule
UTO No. 1 – Full Size Rule

UTO No. 1 – Full Size Rule

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

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UTO 561 – Full Size Rule
UTO 561 – Full Size Rule

UTO 561 – Full Size Rule

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

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Musigraph 100
Musigraph 100

Musigraph 100

USD $25

An unusual slide rule for music theory, which to the best of our understanding is used for helping to convert between musical scales.

Manual and documentation can be found here.  If we knew the first thing about music, this link would almost certainly be invaluable.

Stock: 1

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Staedtler Mars 54408N (Class B) – Full Size Rule
Staedtler Mars 54408N (Class B) – Full Size Rule

Staedtler Mars 54408N (Class B) – Full Size Rule

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

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Staedtler Mars 54408N – Full Size Rule
Staedtler Mars 54408N – Full Size Rule

Staedtler Mars 54408N – Full Size Rule

USD $95

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.

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

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KOH-I-NOOR Multiplex – Full Size Rule
KOH-I-NOOR Multiplex – Full Size Rule

KOH-I-NOOR Multiplex – Full Size Rule

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

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Teledyne Post 44BB-100 – Full Size Rule
Teledyne Post 44BB-100 – Full Size Rule

Teledyne Post 44BB-100 – Full Size Rule

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

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Graphoplex Rietz
Graphoplex Rietz

Graphoplex Rietz

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

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UTO Studium 930 – Full Size Rule
UTO Studium 930 – Full Size Rule

UTO Studium 930 – Full Size Rule

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

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Foxboro Flow Calculation
Foxboro Flow Calculation

Foxboro Flow Calculation

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

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Post 1452W Universal – Full Size Rule
Post 1452W Universal – Full Size Rule

Post 1452W Universal – Full Size Rule

USD $115

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.

Scales include:
Front – inch / A, [ B, CI, C, ] D, K | cm
Back – Formulas and conversions, reverse of slide is S, L, T

Stock: 1

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Jason 801 – Bamboo Full Size Rule
Jason 801 – Bamboo Full Size Rule

Jason 801 – Bamboo Full Size Rule

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

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Flying Fish 1001 – Full Size Rule
Flying Fish 1001 – Full Size Rule

Flying Fish 1001 – Full Size Rule

USD $115

Flying Fish is a Chinese rule manufacturer from a step inside the way-back machine.  It is an advanced 22 scale rule, and comes with the original Chinese language manual (presumably Mandarin).

Scales include:
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

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German Keystone Paper Co 1540A – Pocket Rule
German Keystone Paper Co 1540A – Pocket Rule
German Keystone Paper Co 1540A – Pocket Rule

German Keystone Paper Co 1540A – Pocket Rule

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

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UTO 631U – Pocket Rule
UTO 631U – Pocket Rule

UTO 631U – Pocket Rule

USD $30

While not a common brand of rule, this pocket rule still packs an impressive 24 scales.

Scales include:
Front – LL01, LL02, LL03, CR/DF, T/SF, CIF, %/CI, T/C, R/D, LL3, LL2, LL1
Back – L, K, A, B, T, ST, S, D, DI, P, S

Stock: 1

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Graphoplex 640 – Full Size Rule
Graphoplex 640 – Full Size Rule

Graphoplex 640 – Full Size Rule

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

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Graphoplex 690 Full Size, 25 Scales
Graphoplex 690 Full Size, 25 Scales

Graphoplex 690 Full Size, 25 Scales

USD $125

This fairly rare rule from French manufacturer Graphoplex incorporates some physical features on the rule that are not seen on most others.  On each side of the rule’s end brackets are rubberized feet that keep the rule’s body away from the surface it’s on so that it can be used resting on a desk.

Being French, the manual and forumula reference card are both written in French.

Scales include:
Front – A, B, C, D, L, P, S, T, DI, ST, LL0, LL00
Back – C, D, K, CF, CI, DF, CIF, LL1, LL2, LL3, LL01, LL02, LL03

Stock: 1

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Graphoplex / KOH-I-NOOR X2 Pocket Rule
Graphoplex / KOH-I-NOOR X2 Pocket Rule

Graphoplex / KOH-I-NOOR X2 Pocket Rule

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

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Staedtler Mars 945 24 Pocket Rule
Staedtler Mars 945 24 Pocket Rule

Staedtler Mars 945 24 Pocket Rule

USD $195

An absolute mathematical rapier of the pocke rule world, this Satedtler rule has enough scales for even the most significant problems.  Includes original leather clip pocket case.

Scales include:
Front – C, D, CF, DF, CI, CIF, LL1, LL2, LL3, LL/1, LL/2, LL/3
Back – A, B, C, D, K, L, P, S, T, LL0, LL/0

Stock: 1

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Scientific Instruments Relay 550, Pocket Rule
Scientific Instruments Relay 550, Pocket Rule

Scientific Instruments Relay 550, Pocket Rule

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

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Staedtler 54508 Pocket Rule, w/Sphere Case
Staedtler 54508 Pocket Rule, w/Sphere Case

Staedtler 54508 Pocket Rule, w/Sphere Case

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

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Bruning 2401 Pocket Rule
Bruning 2401 Pocket Rule

Bruning 2401 Pocket Rule

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

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Mystery 5″ Pocket Rule
Mystery 5″ Pocket Rule

Mystery 5″ Pocket Rule

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

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Logarex / KOH-I-NOOR 27401-X Reitz-Enhanced 10″ Rule
Logarex / KOH-I-NOOR 27401-X Reitz-Enhanced 10″ Rule

Logarex / KOH-I-NOOR 27401-X Reitz-Enhanced 10″ Rule

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!

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HOPE 530 12″/10″, Precision Log-Log Rule
HOPE 530 12″/10″, Precision Log-Log Rule

HOPE 530 12″/10″, Precision Log-Log Rule

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!

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Omega 797 Full Size Rule
Omega 797 Full Size Rule

Omega 797 Full Size Rule

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

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Graphoplex 690A Full Size Rule
Graphoplex 690A Full Size Rule

Graphoplex 690A Full Size Rule

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

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