Toyo |
Toyo Specialized Business Development Co.
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 P120 Toyo w/ Bamboo Cursor | Toyo w/ Bamboo Cursor- c1940-1945 Made in Japan - Manufacturer Presumed to be Relay Front Scale A, [ B, CI, C ] D Back Slider: [ 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.
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 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. |
 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 |
 ISRM ALCO 305 Basic Mannheim  ISRM ALCO 305 Basic Mannheim Retail Package |
ALCO 305 Basic Mannheim - 1970 Made in Japan for Al Nyman & Son Inc. New York Front Scale A [ B, CI, C ] D, K Back Slider: [ S, L, T ] Donated by David Hecht, Alexandria, VA |
 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  |
 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 |
 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 |
 P156 Fuji 505 Rietz |
Fuji 505 Rietz Made in Japan - 7 scales Front Scale 13cm // K, A [ B, CI, C ] D, L Back Slider [ S, ST, T ] |
 P157 Fuji 535s |
Fuji 535s Made in Japan - 8 scales Front Scale 13cm // A [ B, CI, C ] D, K \\ 5in Back Slider [ S, L, T ] |
 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 552P 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 |
 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 Slider [ 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 Slider: [ S, L, T ] Back adv: Modine |
 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 |
 P127 Kutsuwa FN-401 | Kutsuwa FN-401 Made in Japan - Retail Package Front Scale A, [ B, CI, C ] D, K Back Slider: [ S, L, T ] |
 ISRM Mead Official Pocket Rule |
Mead Official Pocket Rule Made in Japan. Distributed by Westab, Dayton, Ohio a division of Mead Corp. Front Scale A [ B, CI, C ] D, K Back: Blank Donated by David Hecht, Alexandria, VA |
  ISRM Mead 98-1114 Official 10 inch Rule |
Mead 98-1114 Official 10 inch Rule Made in Japan for Mead Corp. Dayton, Ohio Front Scale A [ B, CI, C ] D, K Back Slider: [ S, L, T ] Donated by David Hecht, Alexandria, VA |
 REF Royal 1091 |
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 Scan contributed by Phillip Rodley, 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 |
 S104 Mannheim |
Mannheim Made in Japan by Uchida Yoko Co. c1970 Front Scale S, K, A [ B, CI, C ] D, L, T Back: Blank |
 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 |
