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).

Manufacturers/Brands Represented in this gallery:
Alco, Bristol Line, Delta, E.TATA, Fuji, Hope, Intra, Jakar, Kutsuwa, Pilot, Royal, Santok TaishoKogo, Toyo, Uchida Yoko, Unknown

More Japanese slide rules may be found in the Sun Hemmi and Relay/Ricoh galleries and additional rebranded Japanese made OEM slide rules may be found scattered amongst the Pickett, Post, United Kingdom, and United States galleries.

Toyo

Toyo Specialized Business Development Co.
Toyo Tokusen-Kogyo Kabusiki-Kaisha Seizou

P120 Toyo w/ Bamboo Cursor

REF Toyo w/ Bamboo Cursor (appeared on eBay)

Toyo w/ Bamboo Cursor- c1940-1945
Made in Japan - Manufacturer Presumed to be Relay
Front Scale
A, [ B, CI, C ] D
Back Scale: [ S, L, T ]
Archive - no longer in collection

Someone in Japan, Prior to, or during WWII provided this with a bamboo cursor frame. It was given to a young American business woman, now a grand mother, as a gift by a Japanese visitor, prior to WWII. The company name is in the insert. At first I thought this was a one-of-a-kind, possibly a homemade cursor frame, but another showed up as being in Ed Chamberlain's collection, when he put it on eBay (sold for $100). My conclusion is that due to a shortage of steel the company (Toyo) that handed out these slide rules as a promotional item, made these useful with the bamboo frame. This specimens has the 'equivalents' sheet on the back.

Mika (Mickey) Shingo in Aichi, Japan translates the Japanese characters as: "Toyo Tokusen-Kogyo Kabusiki-Kaisha Seizou" which means, "Produced by Toyo Specialized Business Development Co., Inc." "Specialized Business Development" implies that this company's business was related to Japanese government (before 1945).

S316 Relay 150

S316 Relay 150 - c1940-1945
Made in Japan - Pre-1945 Relay - missing cursor
Front Scale (extended)
25cm // K, A, [ B, CI, C ] D, L || 10in
Back Scale: [ S, S&T, T ] Equivalents

I found this one that looks like the same company name (see insert) as my P120 above. This tells me that both slide rules must be made by Relay since the Japanese companies were very brand loyal and the distributor would not have used multiple competing suppliers. I assume that this one also had a bamboo framed cursor but it failed to survive the war.

Alco ®, Al Nyman & Son Inc., New York

The Alco brand was started in 1966 by Al Nyman in New York, NY to distribute foreign re-branded products to discount stores. In 1990 the company moved to Florida with locations in Doral and Miami. Other known products are pens, crayons, desk organizers, etc., and later non-prescription eye glasses. The Alco brand is no longer used in the United States.

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.

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 Slide Rule Mfg. Co., Ltd.
Shigets Building, No. 26-18, Asakusabashi, 2-chome, Taito-ku, Tokyo, 111 Japan
Tel: (03) (862) 7644, 7645
Cable Address: HOPESLIDE TOKYO


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

There is some evidence in that Hope and Kutsuwa may be the same


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."

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

UCHIDA YOKO CO., LTD

Uchida Yoko was formed in 1917 and in 1925 the company entered into a domestic (Japan) sales contract to market the Hemmi Bamboo Slide Rule which later becomes its flagship product. The slide rule was an indispensable tool for engineers until the electronic calculator was developed. Sales of this product lay the foundation for later becoming a leading company in the educational market.
During the 1946-1962 Reconstruction Phase, the company utilized the distributor network established for its flagship product, the slide rule. Uchida Yoko enters the school market by marketing science materials for the classroom.
Several European brands, Kent, Royal, Technical Sales, Teknor, and even Nestler, to name a few, contracted with Uchida Yoko to make rebranded slide rules, but the ventures were short-lived with the rapid introduction of the electronic slide rule calculator.
More Uchida Yoko Corporate History

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

Toyo

Toyo Specialized Business Development Co. Toyo Tokusen-Kogyo Kabusiki-Kaisha Seizou

Alco ®, Al Nyman & Son Inc., New York

Bristol Line

Delta - Ozi Seisakusho

E. TATA.

Fuji Keiki Mfg. Co. Ltd., Fuji Keisanjaku

Hope

Intra

Pilot, Japan

Royal

SANTOK, Japan

Taisho Kogyo, Japan

UCHIDA YOKO CO., LTD

Unknown Japanese Manufacturer

Toyo Specialized Business Development Co.
Toyo Tokusen-Kogyo Kabusiki-Kaisha Seizou