Low cost white plastic rule with black vinyl sleeve case case and instruction sheet. Interesting divide/multiply scale identification on left side of C/CI scales. Unbreakable plastic cursor.
(6 Scales)
Front - A, [ B, CI, C, ] D, K

(10 Scales and 10 inch side ruler)
Front - K, A, [ B, CI C, ] D, L
Reverse - [ S, S+T, T]

(10 Scales and 10 inch side ruler)
Front - K, A, [ B, CI C, ] D, L
Reverse - [ S, S+T, T]

(10 Scales and 5 inch side ruler)
Front - K, A, [ B, CI C, ] D, L
Reverse - [ S, S+T, T]

Miniature Log Log bamboo rule and leather case. Has inch scale side ruler, unbreakable plastic cursor with three lines, reversible slide with 4 additional Log Log scales and rear cursor window. A very attractive rule, with more advanced scales (ABCD include over-range extensions!) than typically found on small rules, including the P pythagorean scale. Very uncommon rule in North America.

(13 Scales and 5 inch side ruler)
Front - T, K, A, [ B, CI C, ] D, P, S
Reverse - [ L, LL1, LL2, LL3 ]

Bamboo, Log Log Duplex rule, metal framed glass cursor. This is Hemmi's original pocket duplex rule that was later released with a different scale organization as the POST 1461 versalog. These have blue and red scale markings, with adjustable end braces and cursor.

Three minor variations are known to exist of the POST versalog version of this rule, and include a version with green scale markings for COS angles.

(22 Scales)
Front - LL/1, LL/2, LL/3, DF, [ CF, CIF, CI, C, ] D, LL3, LL2, LL1
Back - L, K, A, [ B, TI, SI, C] D, LL0, LL/0

Duplex bamboo body rule, 2 part hardboard case case, with full manual. White celluloid scales, adjustable end braces, slightly smaller body height than 260 series rules. For electronics use, vector and hyperbolic scales.
(18 Scales)
Front - L, K, A, [ B, CI, C, ] D, T, Gtheta
Reverse - theta, [ Rtheta, P, Q, Q', C, ] LL1, LL2, LL3

Extended size duplex bamboo body rule, 2 part hardboard case case, with full manual. White celluloid scales, adjustable end braces, slightly smaller body height than 260 series rules. For electronics use, vector and hyperbolic scales.
(20 Scales)
Front - Sh, Sh, C, [ D, L, Sx, Tx, ] Ttheta, Th, X
Reverse - DF, [ P, P', Q, CF, CI, ] Stheta, A, D, K

Duplex bamboo body rule, 2 part hardboard case case, with full manual. White celluloid scales, adjustable end braces, slightly smaller body height than 260 series rules. Folded scales (DF, CF, CIF) at the square root of 10, and DI scale is included on the body.
(15 Scales)
Front - K, A, [ B, TI2, TI1, SI, ] D, DI
Reverse - DF, [ CF, CIF, CI, C ] D, L

Duplex bamboo body rule, 2 part hardboard case case, with full manual. White celluloid scales, adjustable end braces, slightly smaller body height than 260 series rules. Folded scales (DF, CF, CIF) at pi, and DI scale is included on the body.
(19 Scales)
Front - K, A, [ B, T, S, ST, C ] D, LL3, LL2, LL1
Reverse - L, DF, [ CF, CIF, CI, C ] D, DI

Duplex plastic body rule and clear display case, with full manual. Similar construction to the P261/262, but body and slide are the same color. Two color scales and unbreakable cursor, with green end braces. Interesting folded scales (DF, CF, CIF) include both pi and the square root of 10, and DI scale is included on the body.
(18 Scales)
Front - K, A, [ B, TI2, TI1, SI, ] D, DI
Reverse - LL2, LL3, DF, [ CF, CIF, CI, C ] D, L, LL1

Duplex bamboo body rule, 2 part hardboard case case, with full manual. White celluloid scales, adjustable end braces. Has hyperbolic sine and tangent scales. Folded scales (DF, CF, CIF) at pi.
(23 Scales)
Front - Sh, Sh, Th, A, [ B, TI, TI, SI, C ] D, LL3, LL2, LL1
Reverse - L, K, DF, [ CF, CIF, CI, C ] D, x, theta

Duplex bamboo body rule, 2 part hardboard case case, with full manual. White celluloid scales, adjustable end braces. Has dedicated electronic scales. Folded scales (DF, CF, CIF) at pi.

(18 Scales)

Front - A, L', C',[ SI, TI, ] D, lambda, F
Reverse - L/db, neper, DF, [ CF, CIF, CI, C, ] D, LL3, LL2, LL1

Powerful and classic Bamboo duplex rule, with Hemmi leather case. These rules were not seen in North America very often (too bad), but provide a wealth of specialized chemical computing power, including atomic weight, temperature and pressure calculations, plus a full function log log rule on the reverse. Very impressive rule, and quite uncommon.

(Unusual 24 Scales !!)
Front - L, K, A, DF, [ CF, CIF, CI, C, ] D, LL3, LL2, LL1
Back - Ch(a-m), Ch(n-z), M1, [ M2, Fdeg, Cdeg, Kdeg, LM, ] mmHg, Kg/cm2, in, Hg Vac, tw

This is the mysterious transitional rule that existed for only a brief period as the Hemmi 258, them became the POST/Hughes-Owens Versalog rule. This is one of only two examples I know of that are dual marked, and is the Hughes-Owens 1777 version of the Versalog.

Duplex bamboo body rule, 2 part hardboard case or leather case, with full manual. White celluloid scales, adjustable end braces. Has full log log scales. Folded scales (DF, CF, CIF) at pi.
(24 Scales)
Front - L, K, A, [ B, T, S, ST, C ] D, DI, LL0, LL/0
Reverse - LL/1, LL/2, LL/3, DF, [ CF, CIF, CI, C ] D, LL3, LL2, LL1

Duplex bamboo body rule, 2 part hardboard case or leather case, with full manual. White celluloid scales, adjustable end braces. Has full log log scales and a P (Pythagorean) scale, plus DI. Scales are self-documenting on the right hand side of the rule face. Folded scales (DF, CF, CIF) at pi.
(25 Scales)
Front - LL/0, LL0, K, A, [ B, T, S, ST, C ] D, DI, P, L
Reverse - LL/1, LL/2, LL/3, DF, [ CF, CIF, CI, C ] D, LL3, LL2, LL1

Beautiful two color rule with two-part hard caseand full manual. Plastic body rule with unusual blue tinted slide and two color scales. Optimized to prevent off-scale readings, the rule includes DF, CF and CIF pi folded scales. A BI scale is employed in parallel with the CI scale to allow single setting operations for multiplication or division of squares or square root. The T and S scales have complimentary angles marked in red. With the P scale, cos theta and the square root of 1-X squared can also be calculated. The very wide Log Log scale range supports exponent calculations from 0.00005 to 22,000. The rule is also self documenting, with functions for each scale shown at the right hand side of the rule. A powerful rule, in a very attractive physical format from Hemmi, and one of their last and best designs. Unbreakable plastic cursor.
(24 Scales !!)
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

Beautiful two color rule with two-part hard case, and full manual. Plastic body rule with unusual blue tinted slide and two color scales. Optimized to prevent off-scale readings, the rule includes DF, CF and CIF pi folded scales. Dual Root (R1, R2) scales and dual Tangent scales (T1, T2) are provided for enhanced accuracy. Uses the Darmstadt system, with the T and S scales on the body with complimentary angles marked in red. The rule is also self documenting, with functions for each scale shown at the right hand side of the rule. A powerful rule, in a very attractive physical format from Hemmi, and one of their last and best designs. Unbreakable plastic cursor.
(25 Scales !!)

Powerful and classic Bamboo duplex rule with Hemmi 2 part hard case, complete with manual. These rules were not seen in North America very often (REALLY too bad), but provide a wealth of specialized electronic calculations, including dB, Xc, XL, Frequency, impedance, wavelength, and a full function log log rule on the reverse. Very impressive rule, with self-documenting scales and quite uncommon. Dual marked scales for some functions.

(Unusual 24/26 Scales !!)
Front - LL3', LL2', LL1', LL2, A, [ B, BI, CI, C, ] D, dB/L, S, T
Back - XL, Xc, F, T1, [ T2, L, Cf, Cz, ] L, Z, fo, lambda

Powerful and classic Bamboo duplex rule with 2 part hard case, complete with the manual. These rules were also not seen in North America very often (too bad), but provide a wealth of specialized trig/survey calculations, including triangle solutions, stadia and curve setting calculations, hydraulics and water head. Very impressive rule, with self-documenting scales and quite uncommon.

(Unusual 25 Scales !!)
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 1 and 2

Extended size duplex bamboo body rule, 2 part hardboard case case, with full manual. Capable of higher accuracy due to increased scale length. White celluloid scales, adjustable end braces. Has hyperbolic sine and tangent scales. Folded scales (DF, CF, CIF) at pi.
(23 Scales)
Front - Sh, Sh, Th, A, [ B, TI, TI, SI, C ] D, LL3, LL2, LL1
Reverse - L, K, DF, [ CF, CIF, CI, C ] D, x, theta

Extended size duplex bamboo body rule, 2 part hardboard case case, with full manual. White celluloid scales, adjustable end braces. Capable of higher accuracy due to increased scale length. Has full log log scales. Folded scales (DF, CF, CIF) at pi.
(23 Scales)
Front - LL/1, LL/2, LL/3, A, [ B, T, S, ST, C ] D, LL3, LL2, LL1
Reverse - L, K, DF, [ CF, CIF, CI, C ] D, LL/0, LL0

Beautiful low cost two color rule with two-part hard case and full manual. Plastic body rule with unusual blue tinted slide and two color scales. Basic student rule with trig scales, the T, ST and S scales have complimentary angles marked in red, and the scales are all self-documenting on the right hand side. Reversable slide has 3 log log scales. Unbreakable plastic cursor.

(13 Scales)

Front - T, K, A, [ B, CI, C, ] D, L, S, ST
Slide Reverse - [ LL1, LL2, LL3 ]

Beautiful low cost two color rule with two-part hard case and full manual. Plastic body rule with unusual blue tinted slide and two color scales. Basic student rule with folded and basic trig scales, the T, and S scales have complimentary angles marked in red, and the scales are all self-documenting on the right hand side. Reversable slide has 3 log log scales. Unbreakable plastic cursor.

(13 Scales)

Front - T, K, A, [ B, CI, C, ] D, L, S, ST
Slide Reverse - [ LL1, LL2, LL3 ]

Full size duplex bamboo body rule, 2 part hardboard case case. Unusual trig scales and factors, presumably meaningful something to do with gear cutting. White celluloid scales, adjustable end braces.

(18 Scales)

Front - (An=20) G2, G1, F2, F1, [ X, F1/G1, ] Z1+Z2, G', F'
Reverse - (An=14.5) G2, G1, F2, F1, [ X, CI, C, ] D, A

(5 Scales)
Front
- A, D, C, CI, L

(4 Scales)
Front
- A, D, C, CI

Beautiful miniature bamboo rule and leather case, in an original Hemmi box with full manual. Has inch scale side ruler, unbreakable plastic cursor, reversible slide with 4 additional scales and rear cursor window. A very attractive rule, with more scales (includes folded scales and enhanced trig scales) than typically found on small rules. Regrettably, these boxes all are slightly crumpled, and the manuals and/or boxes are slightly foxed. The rules are still sealed in factory bags, but need to be wiped down with a damp cloth to remove the years of storage oxidation. Rules and cases are still wonderful, and not to be missed! Very uncommon rule in North America.
(11 Scales and 5 inch side ruler)
Front - K, DF, [ CF, CI C, ] D, A
Reverse - [ TI2, TI1, L, SI]

Beautiful Full size bamboo rule and two part hard case. Includes surveying (stadia) sin-cos and cos squared scales, and cm/inch rulers on the sides. Has additional trig scales on reverse, plus equivalence and setting tables.

A powerful and attractive desk rule, with framed glass cursor.
(10 Scales, 2 Rulers)
Front - inch, L, D, [ sin-cos, cos2, C, ] D, A, cm
Back - tables [ S, ST, T ]

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