Misc. Japanese 計算尺
Slide Rule Gallery

This gallery is dedicated to Japanese slide rules and manufacturers. (Manufacturers not found in their own gallery).

Advergi

Advergi Pocket Slide Rule ISRM 20.04.01.345

Advergi Pocket Slide Rule Made in Japan - Plastic stock Front Scale 5cm // A [ B, CI, C ] D \\ 5in Back:[ S, ST, T ] Back Promo: Thomas Mitchell, Bolton, Massachusettes Gift of Philip Stanley Collection

Alco ®, Al Nyman & Son Inc., New York

P266 Alco Personal Calculator	Alco Personal Calculator Made in Japan - Aluminum Addiator and Slide Rule Front Scale Mechanical Addiator (+ / -) Back: A [ B, CI, C ] D
ALCO 305 Basic Mannheim ISRM 09.01.12.92	ALCO 305 Basic Mannheim - (c)1970 Made in Japan for Al Nyman & Son Inc. New York Front Scale A [ B, CI, C ] D, K Back Scale: [ S, L, T ] Donated by David Hecht, Alexandria, VA
ALCO 305 Basic Mannheim in Retail Package ISRM 09.03.24.01	ALCO 305 Basic Mannheim - (c)1970 Made in Japan for Al Nyman & Son Inc. New York Front Scale A [ B, CI, C ] D, K Back Scale: [ S, L, T ]
ALCO 578 Basic Mannheim in Retail PackageISRM 12.05.02.05	ALCO 578 Basic Mannheim - (c)1970 Made in Japan for Al Nyman & Son Inc. New York Front Scale A [ B, CI, C ] D, K Back Scale: [ S, L, T ] Owned by Ruth Moira (Kilby) Kane (1921-2007). Donated in her memory by her daughter Anne Kilby, Kingston, Washington Ruth was a physicst for Livermore Labs, and her daughter, Ann, remembered that she said "I just wanted to see what a $1.00 slide rule looked like.". See other slide rules from this talented family in the Circular, K&E, Post and Pickett Galleries.

Bristol Line

Bristol Line P18-4 (1963) ISRM 12.06.24.34	Bristol Line P18-4 - Simplex Made in Japan Front Scale 4in // A [ B, CI, C ] D, K Back Scale: [S, ST, T ] Donated by Anonymous collector and daughter Stephanie, Phoenix, Arizona
Bristol Line P19-5 ISRM 12.06.24.33	Bristol Line P19-5 - Simplex Made in Japan Front Scale 5in // K, A [ B, CI, C ] D, L Back Scale: [S, ST, T ] Donated by Anonymous collector and daughter Stephanie, Phoenix, Arizona

Delta - Ozi Seisakusho

P236 Delta - Ozi SeisaKusho

Delta - Ozi SeisaKusho Made in Japan - Aluminum with stainless rod as used to retain slide Front Scale DF [ CF, CI, C ] D Back: Blank

E. TATA.

E. TATA. Pocket Mannheim Calculating Rule	E. TATA. Pocket Mannheim Calculating Rule Made in Japan - Bamboo Stock, similiar to Ricoh. Front Scale A [ B, CI, C ] D Back: Blank Ebay photo
E. TATA. No. 522 Beginner's Slide Rule	E. TATA. No. 522 Beginner's Slide Rule Only the sleeve (Case) was found in the archive. It is shown here to establish that the model existed.

Foreign

Foreign 93 Pocket Slide Rule

Foreign 93 Pocket Slide Rule Made in Japan - Possibly by Santok Front Scale A [ B, CI, C ] D, K Back: Blank

Fuji Keiki Mfg. Co. Ltd., Fuji Keisanjaku

The Fuji slide rule company started in 1947-49, maybe as a derivative of Giken, and changed their name into Fuji Keiki Mfg. Co. Ltd., Fuji Keisanjaku and into Fuji Slide Rule Manufacturing Co Ltd. Fuji manufactured slide rules under their own brand and also rebranded their modele for other distributors. Fuji logos may be found on Fuji, Taisho, Gekin, Dietzgen, Eco-Bra, Jakar, Prentiss, Staedtler and Wolters-Noordhoff. These may be seen in other ISRM galleries. The Fuji Illustrated Catalog on the left has images and data compiled by Jose G. Fernandez, of Spain.

REF Fuji No. 42	Fuji No. 42 Made in Japan - 8 scales, Molded plastic construction. 150.5 x 27 x 4 mm Front Scale DF [ CF, CI C ] D Back: [ S, L, T ] Archive - Herman van Herwijnen's Slide Rule Catalogue
REF Fuji No. 51	Fuji No. 51 Made in Japan - 9 scales, Molded plastic construction. 150.5 x 27 x 4 mm Front Scale A [ B, CI, C ] D, K Back: [ S, L, T ] Archive - Herman van Herwijnen's Slide Rule Catalogue
REF Fuji No. 88	Fuji No. 88 Made in Japan - 9 scales, Molded plastic construction. 225x30x4 mm Front Scale K, DF [ CF, CI, C ] D, A Back: [ S, L, T ] Archive - Herman van Herwijnen's Slide Rule Catalogue
S246 Fuji F-100	Fuji F-100 Made in Japan - 7 scales Front Scale DF [ CF, CIF, CI, C ] D, A Back: Blank Original Owner: NIB/Netherlands
REF Fuji F-102B	Fuji F-102B Made in Japan - 12 scales, Molded plastic construction, 321x45x4 mm Front Scale K, S, A [ B, CI, C ] D, T, L Back: [ S, L, T ]Blank Archive - Herman van Herwijnen's Slide Rule Catalogue
REF Fuji (Wolters-Noordhoff) FJ-102	Fuji (Wolters-Noordhoff) FJ-102 Made in Japan - 14 scales, Molded plastic construction, 313x43x5 mm Front Scale L, DF [ CF, CIF, CI, C ] D, A, K Back scales: 25cm [ S, ST, T1, T2 ] Archive - Herman van Herwijnen's Slide Rule Catalogue
REF Fuji No. 104B	Fuji No. 104B Made in Japan - 14 scales, Molded plastic construction, 320x45x4 mm Front Scale T1 Cot, T2 Cot, K, A [ B, CI, C ] D, S Cos, ST, L Back: blank Archive - Herman van Herwijnen's Slide Rule Catalogue
REF Fuji No. 106	Fuji No. 106 Made in Japan - 13 scales, Molded plastic construction, 320x45x3.8 mm Front Scale T Cot, ST Cot, DF [ CF, CIF, CI, C ] D, A, S Cos Back: blank Archive - Herman van Herwijnen's Slide Rule Catalogue
REF Fuji No. 112 (Wolters-Noordhoff)	Fuji (Wolters-Noordhoff) No. 112 Made in Japan - 14 scales, Molded plastic construction, 313x43x5 mm Front Scale L, DF [ CF, CIF, CI, C ] D, A, K Back scales: 25cm [ S, ST, T1, T2 ] Archive - Herman van Herwijnen's Slide Rule Catalogue
S192 Fuji 129 Student Log	Fuji 129 Student Log Made in Japan - 14 scales Front Scale L, K, A [ B, CI, C ] D, S, ST, T Back Scale 25cm [ S, LL-1, LL-2, LL-3 ] 10inch
S253 Fuji 129-01 Student Log	Fuji 129-01 Student Log Made in Japan - Note: The bridges were put on the opposite side Front Scale L, K, A [ B, CI, C ] D, S, ST, T Back Scale 25cm [ S, LL-1, LL-2, LL-3 ] 10inch Original Owner: NIB/Netherlands
Fuji QuateLog No201P Log/Log ISRM 13.02.13.04	Fuji QuateLog No201P Log/Log Made in Japan - 20 scales Front Scale 25cm // LL1, LL2, LL3, A DF [ B, BI, CI, C ] D, P, K, LL0 Back Slide: T2 Cot2, T Cot, L, S Cos Back: blank Note: This specimen is in its original retail box and plastic sleeve. No instructions. Gift of Phillip Rodley of UpperHutt, New Zealand This slide rule and others in the ISRM archives and galleries were donated through the generosity and support of Phillip Rodley. Phil is very enthusiatic in finding slide rules in New Zealand that are not available to the rest of the world, and gifting them to ISRM. He enjoys the American brands that have leather sleeves and belt loops.
Fuji No. 203B ISRM 13.08.12.01	Fuji No. 203B Made in Japan - 8 scales. no trig scales. Front Scale 25cm // A [ B, CI, C ] D, K \\ 10inch Back Slide: Blank Back: blank Note: This specimen is in a model 129 retail box and plastic sleeve, with instructions. Gift of Phillip Rodley of UpperHutt, New Zealand
Fuji No.251 Rietz c1955 ISRM 13.10.09.02	Fuji No.251 Rietz c1955 Made in Japan - 20 scales Front Scale 25cm // K, A [ B, CI, C ] D, L Back slide: [ S Cos, ST, T Cot ] Back: blank Original owner: Pam Frost '55, scratched on back of stock. Gift of Phillip Rodley of UpperHutt, New Zealand Note: Need to add scan of back of slide. See example below.
REF Fuji No. 251 Rietz	Fuji No. 251 Rietz Made in Japan - 13 scales, Molded plastic construction, 290x40x4 mm Front Scale 25cm // K, A [ B, CI, C ] D, L Back scales: [ S Cos, ST, T Cot ] Archive - Herman van Herwijnen's Slide Rule Catalogue
P156 Fuji 505 Rietz	Fuji 505 Rietz Made in Japan - 7 scales Front Scale 13cm // K, A [ B, CI, C ] D, L Back Scale [ S, ST, T ]
P156 Fuji 534S Rietz	Fuji 534S Rietz Made in Japan - 7 scales, 150x35x4 mm Front Scale 13cm // K, A [ B, CI, C ] D, L \\ 5inch Back Scale [ S, ST, T ] Archive - Herman van Herwijnen's Slide Rule Catalogue
P156 Fuji 534S Rietz	Fuji 534S Rietz Made in Japan - 7 scales, 150x35x4 mm Front Scale 13cm // K, A [ B, CI, C ] D, L \\ 5inch Back Scale [ S, ST, T ] Archive - Herman van Herwijnen's Slide Rule Catalogue
P157 Fuji 535s	Fuji 535s Made in Japan - 8 scales Front Scale 13cm // A [ B, CI, C ] D, K \\ 5in Back Scale [ S, L, T ]
P156 Fuji 536C Log Log	Fuji 536S Log Log Made in Japan - 14 scales, 150x34x4 mm Front Scale 13cm // S, T, A [ B, CI, C ] D, K, P Back Scale [ L, LL1, LL2, LL3 ] Archive - Herman van Herwijnen's Slide Rule Catalogue
P052 Fuji 552P Duplex Log/Log	Fuji 552P Duplex Log/Log Made in Japan - 23 scales Front Scale LL-0, K, A [ B, T, S, C ] D, P, L, LL0 Back Scale LL-1, LL-2, LL-3, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1
REF Fuji 553P Duplex Log/Log	Fuji 553P Duplex Log/Log Made in Japan - 23 scales Front Scale T1, T2, DF [ CF, CIF, CI, C ] D, P, S Cos, ST Tan Back Scale LL-1, LL-2, LL-3, A [ B, L, K, C ] D, LL3, LL2, LL1 Multiple Hairlines Archive - Scan provided by Koen Schram, Netherlands
Fuji 1200 Duplex Log/Log ISRM 12.06.24.30	Fuji 1200 Duplex Log/Log Made in Japan - 17 scales Front Scale L, DF [ CF, CIF, CI, C ] D, K Back Scale (extended) RLL, LL, A [ B, S(5.5°-90°), T(5.5°-45°), K, C ] D, DI Multiple Hairlines Note: slide rule body has a light green tint to it Donated by Anonymous collector and daughter. The collector, who prefers to remain anonymous, obtained a B.S. degree in Physics from Taiwan's National Tsing Hua University in 1971. His love for computation has encouraged him to build a collection of slide rules, HP and TI calculators, as well as abaci, many displayed at ISRM.
Fuji 1250S Duplex Log Log REF	Fuji 1250S Duplex Log Log Made in Japan - 27 scales, 335.5x49x5 mm Front Scale (extended) LL-1, LL-2, LL-3, A [ B, L, K, C ] D, LL3, LL2, LL1 Back Scale T1 Cot, T2 Cot, DF [ CF, CIF, CI, C ] D, P, S Cos, ST Cos Archive - Herman van Herwijnen's Slide Rule Catalogue
Fuji 1280 Duplex Log/Log REF	Fuji 1280 Duplex Log/Log Made in Japan - For Electrical and Mechanical Engineers. Front Scale LL-1, LL-2, LL-3, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1 Back Scale (extended) L, K, A [ B, ST ST, T Cot, S Cos, C ] D, DI, LL0, LL-0 Multiple Hairlines" HP, Kw, C Scan provided by Steve Searle Collection, Nashville, Tennessee.

Hope

Hope No32 Mannhiem ISRM 17.06.17.05	Hope No32 Mannhiem Made in Japan - 9 scales Front Scale S, K, A [ B, CI, C ] D, L, T Gifted by Phillip Rodley, New Zealand
Hope No. 51 Mannheim REF	Hope No. 51 Mannheim Made in Japan - 9 scales, 285x40x3.5 mm Front Scale: S, K, A [ B, CI, C ] D, L, T Back Scale: Blank Archive - Herman van Herwijnen's Slide Rule Catalogue
Hope No52 Mannhiem ISRM 17.06.17.05	Hope No52 Mannhiem Made in Japan - 9 scales Front Scale S, K, A [ B, CI, C ] D, L, T Back: Blank Note: This specimen is in its blue and clear plastic sleeve. No instructions. Gifted by Phillip Rodley, New Zealand
Hope No52-G Mannhiem (Green Slide) ISRM 13.02.13.02	Hope No52-G Mannhiem (Green Slide) Made in Japan - 9 scales Front Scale S, K, A [ B, CI, C ] D, L, T Back: Original Owner name, Ian G. Angus, on stock and slide Note: This specimen is in its plastic sleeve. No instructions. Gifted by by Phillip Rodley, New Zealand
Hope No. 53 Basic REF	Hope No. 53 Basic Made in Japan - 6 scales, 151x27x3 mm Front Scale: A [ B, CI, C ] D, K Back Scale: Blank Archive - Herman van Herwijnen's Slide Rule Catalogue
Hope No. 54 Mannheim REF	Hope No. 54 Mannheim Made in Japan - 9 scales, 151x27x4 mm Front Scale: A [ B, CI, C ] D, K Back Scale: [ S, L, T ] Archive - Herman van Herwijnen's Slide Rule Catalogue
Hope No. 57 Mannheim REF	Hope No. 57 Mannheim Made in Japan - 9 scales, 150x37x4.2 mm Front Scale: 13cm // A [ B, CI, C ] D, K \\ 5inch Back Scale: [ S, L, T ] Archive - Herman van Herwijnen's Slide Rule Catalogue
S216 Hope 65-G	Hope 65-G - Closed simplex Made in Japan by Hope Slide Rule Mfg. Co., Ltd. Front Scale LL3, LL2, LL1, A [ B, BI, CI, C ] D, DI, K, LL0 Back Scale [ T1, T2, L, S ] Back: blank
REF Hope 530	Hope 530 - Duplex Made in Japan by Hope Slide Rule Mfg. Co., Ltd. Front Scale LL01, LL02, LL03 , A [ B, L, K, C ] D, LL3, LL2, LL1 Back Scale T Cot, ST arc, DF [ CF, CIF, CI, C ] D, P, S Cos Archive - Kimura Satoru Collection, Japan
P147 Hope - Modine Pocket	Hope - Modine Pocket Made in Japan, by Hope Slide Rule Mfg. Co., Ltd. Front Scale 13cm // A, [ B, CI, C ] D, K \\ 5in Back Scale: [ S, L, T ] Back adv: Modine

Intra

REF Intra 1081

Intra 1081 Made in Japan for British Company Intra, presumed to be made by Uchida Yoko, Co Front Scale T2, T1, A [ B, BI, CI, C ] D, P, S Cos, ST Back Scale LL1, LL2, LL3 DF [ CF, CIF, CI, C ] D, L, K Cursor: Multiple Hairlines Scan contributed by Rod Lovette Collection, UK

Jakar 11 Pocket Rietz ISRM 14.10.15.04	Jakar 11 Pocket Rietz Made in Japan by Fuji for British Market Front Scale 13cm // A [ B, CI, C ] D, K \\ 5in Back Slide: [ S, L, T ] Gift of Edward Wright, Odenton, Maryland Manual 7.01Mb Includes models 11 & 55 Rietz, 22 & 77 Darmstadt, 29 Student Log/Log,33 & 99 Duplex Log/Log, 66 Electro, and 88 College Duplex.
Jakar 22 Pocket Darmstadt with Insert ISRM 12.05.05.02 Retail Box	Jakar 22 Pocket Darmstadt with Insert Made in Japan by Fuji for British Market Front Scale 13cm // LL2, LL3, A [ B, CI, C ] D, K, LL1 Back Slide: [ P, T, L, S ] With black leather wallet in Retail box. Donated by Richard Davis, Las Vegas, Nevada Manual 7.01Mb Includes models 11 & 55 Rietz, 22 & 77 Darmstadt, 29 Student Log/Log,33 & 99 Duplex Log/Log, 66 Electro, and 88 College Duplex.
Jakar 29 Student Log/Log (Version 1)	Jakar 29 Student Log/Log (Version 1) Made in Japan by Fuji for British Market Front Scale: L, K, A [ B, CI, C ] D, S, ST, T Back Scale: 25cm [ S, LL2, LL3 ] 10in Original Owner/Location: T. Pierce (on sleeve)/England
Jakar 29 Student Log/Log (Version 2) ISRM 09.01.12.98	Jakar 29 Student Log/Log (Version 2) Note: additional Log scale on slide Made in Japan by Fuji for British Market WHSmith Front Scale: L, K, A [ B, CI, C ] D, S Cos, ST, T Cot Back Scale: 25cm [ S, LL2, LL3 ] 10in Donated by David Hecht, Alexandria, VA 2.73MB
Jakar 33 Duplex LogLog Pocket ISRM 12.05.05.03 Retail Box	Jakar 33 Duplex LogLog Pocket Made in Japan by Fuji for British Market Front Scale: LL-0, K, A [ B, T Cot, S Cos, C ] D, P, L, LL0 Back Scale: LL-1, LL-2, LL-3, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1 With black leather wallet in Retail box. Donated by Richard Davis, Las Vegas, Nevada Manual 7.01Mb Includes models 11 & 55 Rietz, 22 & 77 Darmstadt, 29 Student Log/Log,33 & 99 Duplex Log/Log, 66 Electro, and 88 College Duplex.
S348 Jakar 66 Electro	Jakar 66 Electro Made in Japan by Fuji for British Market Front Scale 10in // K, E (Volt/Dynamo/Motor Efficiency), A(kw) [ B(PS), CI, C ] D, LL3, LL2, L Back Scale: [ S cos, ST, T  cot ] Cursor: Multiple Hairlines Original Owner/Location: Unk/England Manual 8.48Mb Includes Jakar Model Nos 11 and 55 Rietz, 22 and 77 Dramstadt and 66 Electro.
Jakar 99 Duplex LogLog ISRM 15.05.12.18	Jakar 99 Duplex LogLog Made in Japan by Fuji for British Market Front Scale: LL-1, LL-2, LL-3 DF [ CF, , CIF, CI, C ] D, LL3, LL2, LL1> Back Scale: LL-0, K, A [ B, ST, T Cot, S Sin, C ] D, P, L, LL0 Cursor: Multiple Hairlines Gift of Colin Barnes, United Kingdom
Jakar 523A Pocket ISRM 12.05.05.01 Retail Box	Jakar 523A Pocket Made in Japan by Fuji for British Market - c1970 Front Scale 13cm // A [ B, CI, C ] D, K, 5in Back Scale:[ S, L, T ] Original Owner/Location: NIB/England With green plastic wallet in Retail box. Donated by Richard Davis, Las Vegas, Nevada
Jakar No. 1011 LogLog ISRM 15.05.12.11	Jakar No. 1011 LogLog Made in Japan by Fuji for British Market Front Scale: 25cm // LL3, LL2, LL1, A [ B, BI, CI, C ] D,DI, K, LL0 Back Scale:[ T2 Cot, T1 Cot, L, S Cos ] Back: Blanks Cursor: Multiple Hairlines Gift of Colin Barnes, United Kingdom
Jakar No. 1013 LogLog ISRM 17.05.02.01	Jakar No. 1013 LogLog Made in Japan by Fuji for British Market Front Scale: 10in // LL2, A [ B, C ] D, LL3 Back Scale: Blank Back: Blank Note:" top inch scale broken off on right end. Gift of Mike weaver, United Kingdom

Kutsuwa 10 Inch Mannheim 'Engraved' Slide Rule ISRM 13.11.05.02 Accompanying Insert Showing Conversions	Kutsuwa 10 Inch Mannheim 'Engraved' Slide Rule Made in Japan - in Clear plastic sleeve Material: Stock is made in 3 layers of plastic, the slide in two. Front Scale A, [ B, CI, C ] D, K Back Scale: [ S, L, T ] Note: Cursor flange was partially broken and tension spring is missing. Restored good enough for display Gift Of Phillip Rodley, Upper Hutt, New Zealand Instructions (6.83MB PDF
Kutsuwa No. 1004 REF	Kutsuwa No. 1004 Made in Japan - Retail Package Front Scale 25cm // LL3, LL2, LL1, A, [ B, BI, CI, C ] D, DI, K, LL0 Back Scale: Blank. Archive - Eric Marcotte, Ph.D Collection, Canada
P127 Kutsuwa FN-401 Pocket Mannheim	Kutsuwa FN-401 Pocket Mannheim Made in Japan - Retail Package Front Scale A, [ B, CI, C ] D, K Back Scale: [ S, L, T ]

Pilot, Japan

Pilot 200-A 8 inch Mannheim ISRM 13.08.12.03

Pilot 200-A 8 inch Mannheim Made in Japan Front Scale: K, A [ B, CI, C ] D, L Back: Blank Gifted by Phillip Rodley of UpperHutt, New Zealand

Royal

Royal MYCOM Refrigerant Compressor Pressure and Conversion ISRM 18.07.11.07	Royal MYCOM Refrigerant Compressor Pressure and Conversion Made in Japan by Royal for MYCOM Los Angeles Front Scales: kg/cm2 (gage), kg/cm2 (abs) , NH 3 °C, °F, R122 °C, °F, Lb/in2 (gage), Lb/in2 (abs) Back Scale: kg/cm2, Lb/in2, °C, °F, cm, in, Kg, Lb Note: R22, R12 and NH3 are types of refrigerant. Gifted by Phil Stanley of Worcster, Massachussettes Philip Stanley retired from engineering to become a full-time dealer in and appraiser of antique scientific instruments and tools as The Analytical Engine. He has written two books on antique measuring instruments, and numerous articles on instruments and technology, and has given several talks on these subjects. Phil appeared on the Antiques Road Show on PBS, as an appraiser, in 2012, 2013, 2014.
Royal 1002A ISRM 17.05.02.51	Royal 1002A Made in Japan probably by Uchida Yoko, Co Front Scale S, K, A [ B, CI, C ] D, L, T Back Scale: blank Gifted by Mike Weaver, UK
Royal 1091 Log Log ISRM 13.02.13.03	Royal 1091 Made in Japan probably by Uchida Yoko, Co Front Scale LL01, LL02, LL03, A [ B, L, K, C ] D, LL3, LL2, LL1 Back Scale T2, T1, ST, DF [ CF, CIF, CI, C ] D, P, S Cos Note: In plastic sleeve, no instructions Gifted by Phillip Rodley of UpperHutt, New Zealand
REF Royal 1091 Executive	Royal 1091 Executive Made in Japan probably by Uchida Yoko, Co Front Scale LL01, LL02, LL03, A [ B, L, K, C ] D, LL3, LL2, LL1 Back Scale T2, T1, ST, DF [ CF, CIF, CI, C ] D, P, S Cos Scan contributed by Rod Lovette Collection, UK
REF Royal 5091 Universita	Royal 5091 Universita Made in Japan probably by Uchida Yoko, Co Front Scale LL01, LL02, LL03, A [ B, L, K, C ] D, LL3, LL2, LL1 Back Scale T2, T1, ST, DF [ CF, CIF, CI, C ] D, P, S Cos Scan contributed by Rod Lovette Collection, UK
Royal Executive No. 5091 ISRM 12.09.26.01	Royal Executive No. 5091 Made in Japan probably by Uchida Yoko, Co Front Scale (extended) LL01, LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1 Back Scale (extended) T2 Cot, T1 Cot, L, A [ B, K, CI, C ] D, ST, S CosP Donated to ISRM By Ville Koskinen, UK Ville says that this slide rule's history is rather ambiguous. "My father was about to throw it away some years ago, and I salvaged it instead. It may have been bought in early 1970s in Finland and used in college -- or it may have belonged to a relative and then given to my father."

SANKYO SLIDE RULE CO., LTD., Tokyo, Japan, Japan

Sankyo Generic Pocket Slide Rule - AEI Promo ISRM 19.10.27.02 Sleeve

Sankyo Generic Pocket Slide Rule Made in Japan by Sankyo Front Scale: A [ B, CI, C ] D, K Back: AEI Promo Gifted by Phillip Rodley of UpperHutt, New Zealand Instructions (4.82MB PDF

SANTOK, Japan

Santok Generic Pocket Slide Rule - Seaforth Promo ISRM 13.06.20.05 Sleeve	Santok Generic Pocket Slide Rule - SEAFORTH Promo Made in Japan by Santok, sleeve labed 'Seaforth' Front Scale: A [ B, CI, C ] D, K Back: Blank Gifted by Phillip Rodley of UpperHutt, New Zealand Instructions (1.46MB PDF
Santok Generic Pocket Slide Rule with linear scales ISRM 13.07.03.07	Santok Generic Pocket Slide Rule with linear scales Made in Japan by Santok, Japan Front Scale: 13 // A [ B, CI, C ] D, K \\ 5in Back scale: [ S, L, T ] Back: Ads: Agastat Timing Instruments, Stimsonite Signal Products, ESNA Elastic Stop Nut Corp of America Gifted by Daniel Swerdlow of Bethesda, Maryland Instructions (1.37MB PDF

Taisho Kogyo, Japan

Taisho Kogyo No.202 Slide Rule with Protractor ISRM 18.07.11.01

Taisho Kogyo No.202 Slide Rule with Protractor Made in Japan Front Scale: A [ B, CI, C ] D \\ 20cm Back: Equivalents/guage marks Gifted by Phil Stanley of Worcster, Massachussettes Philip Stanley retired from engineering to become a full-time dealer in and appraiser of antique scientific instruments and tools as The Analytical Engine. He has written two books on antique measuring instruments, and numerous articles on instruments and technology, and has given several talks on these subjects. Phil appeared on the Antiques Road Show on PBS, as an appraiser, in 2012, 2013 and 2014.

UCHIDA YOKO CO., LTD

Uchida Yoko Co. Generic Mannheim ISRM 13.06.25.09 Uchida Yoko Slide Rule Instructions (Cover) Norma Tanner with Pickett Teaching slide rule

Uchida Yoko Co. Generic Mannheim Made in Japan by Uchida Yoko Co. c1970 Front Scale S, K, A [ B, CI, C ] D, L, T Back: Blank Gifted by Norma Tanner of Libertyville, Illinois Norma has been a participant of the ISRM Slide Rule Loaner Program. In addition, she had her own collection that she loaned out to students. This one is part of the collection sent to ISRM. Norma writes: "After teaching math and/or science for 24 years, I am now enjoying retired life. Having been educated at MIchigan State University during a time when using a slide rule was the only technology available for advanced calculations, I decided to create a unit of study for my students that would introduce them to the slide rule. My goals were for students to strengthen their ability to estimate and use scientific notation, as well as to discover the historic significance of the slide rule. While it was hard for them to put aside their electronic calculators, they were fascinated, engaged, and thrilled when they could multiply 2 x 3 and actually get 6 instead of 5.9. In the end my students were happy to be reunited with their calculators, but had a new appreciation for the value of estimating, scientific notation, and accuracy in measurement. Goals met! "

Unknown Japanese Manufacturer

ISRM Model 883 (Unknown Manufacturer)	Model 883 (Unknown Manufacturer) Made in Japan Front Scale K, DF [ CF, CI, C ] D, A Back Scale Equivalents[ S, L, T ] D, A Donated by David Hecht, Alexandria, VA
Japanese Pocket Mannhiem (C.J. Edwards Promotional)	Pocket Mannhiem (C.J. Edwards Promotional) Made in Japan Front Scale A [ B, CI, C ] D, K Back Scale (flip slide over) [ S, L, T ] Note: Grey plastic sleeve Back advertising: The C.J. Edwards Co. Cleveland, Ohio Donated By Anonymous Collector and daughter
Japanese Pocket Mannhiem (ITT Defense Promotional)	Pocket Mannhiem (ITT Defense Promotional) Made in Japan Front Scale 13cm // A [ B, CI, C ] D, K \\ 5inch Back Scale (flip slide over) [ S, L, T ] Note: Grey plastic sleeve Back advertising: ITT Defense Communications Div. Nutley, New Jersey Donated By Anonymous Collector and daughter
ISRM Japanese Pocket Mannhiem (Unknown Manufacturer)	Japanese Pocket Mannhiem (Unknown Manufacturer) Made in Japan Front Scale 13cm // A [ B, CI, C ] D, K \\ 5in Back Scale (flip slide over) [ S, L, T ] Note: Grey plastic sleeve Donated by David Hecht, Alexandria, VA
ISRM Model Pocket Mannhiem (Unknown Manufacturer)	Pocket Mannhiem (Unknown Manufacturer) Made in Japan - Promotional slide rule for Fawick Airflex Clutches and Brakes Front Scale A [ B, CI, C ] D, K Back Scale [ S, L, T ] Donated by David Hecht, Alexandria, VA