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
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 $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
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 $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
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 $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 $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 $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 $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 $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 $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
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 $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
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 $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
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
Sphere Research Corporation