S.I.C. 
Scientific Instruments Company
Berkeley, California - Note: SINCO logo used in 1965
S.I.C.
 C20 SIC 120 (Version 1)4"(Rototrig 200) |
SIC 120 (Version 1)4"(Rototrig 200) 1962 Made in Japan for Scientific Instruments Co. Front Scale K, A, D ( C, CI, EI (spiral) ) Back Scale L, DI, D T, S, T, S, T, T&S Stock Dimensions (mm): 108 Dia x 4 |
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 C36 SIC 120 4"(Rototrig 200) |
SIC 120 4"(Rototrig 200) (Logo)1962 Made in Japan for Scientific Instruments Co. Front Scale K, A, D ( C, CI, EI (spiral) ) Back Scale L, DI, D T, S, T, S, T, T&S Stock Dimensions (mm): 108 Dia x 4  Box
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 C25 SIC 120 (Version 1)4" |
SIC 120 (Version 1)4" Made in Japan for Scientific Instruments Co. Front Scale K, A, D ( C, CI, EI (spiral) ) Back Scale L, DI, D T, S, T, S, T, T&S Stock Dimensions (mm): 108 Dia x 4  Box
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 REF SIC 120 (Version 2) |
SIC 120 (Version 2) - 1962 Made in Japan for Scientific Instruments Co. - 10.8cm Dia Front Scale K, A, D ( C, CI, EI (spiral) ) Back Scale L, DI, D T, S, T, S, T, TS Archive - Ted White Collection |
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 C38 SIC 120-D 1963 Duplex 4" |
SIC 120-D 1963 Duplex 4" Made in Japan for Scientific Instruments Co. Front Scale K, A, D ( C, CI, B, EI (spiral) ) Back Scale L3, L2, L, DI, D (C, T, S, T, S, T, T&S) |
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 REF SIC 130 (Version 1) 4-3/8" |
SIC 130 4-3/8" Made in Japan for Scientific Instruments Co. Front Scale K, A, D ( C, CI, EI (spiral) ) Back Scale L, DI, D T, S, T, S, T, T&S Stock Dimensions (mm): 108 Dia x 4 Note: This is the same exact SR as the 120, There may have been some early model number changes when the company first got started
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 C35 SIC 250 3"(SINCO Rototrig 100) |
SIC 250 3"(SINCO Rototrig 100) Made in Japan for Scientific Instruments Co. 1962 Front Scale K, A, D ( C, CI, L ) Back Scale D, T, S, T<45, S<45, T&S<5.8 Stock Dimensions (mm): 81 Dia x 3  Box
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 C37 Concise SIC 300B Duplex (Prototype of SIC 250D) |
Concise SIC 300B Duplex (Prototype of SIC 250D)- 1961 Made in Japan by Concise for SIC Front Scale K, A, D ( C, CI, B, L ) Back Scale LL3, LL2, D ( C, S Cos, T1 Cot1, T2 Cot2, ST Stock Dimensions (mm): 111 Dia x 3 |
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 S520 SIC-Relay 102 (SIC 1020) Basic Beginner JK-3 | SIC-Relay 102 (Early prototype of SIC 1020) Made in Japan by Relay/Ricoh for SIC - code HK-3 Front Scale A, [ B, CI, C ] D, K Back Scale [ S, L, T ] D Stock Dimensions (mm): 280 x 28.5 x 8.5  Case Logo
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 P104 SIC-Relay 550 (early prototype of SIC 5500) | SIC-Relay 550 - Early
prototype of SIC 5500) Made in Japan by Relay/Ricoh for SIC - code HK-3 Front Scale A, [ B, S, T, C ] D, K Back Scale DF [ CF, CI, C ] D, L Stock Dimensions (mm): 175 x 24.5 x 4.8 |
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 S519 SIC 1020 Basic Beginner | SIC 1020 Basic Beginner - early Made in Japan by Relay/Ricoh for SIC - code JK-4 Front Scale A, [ B, CI, C ] D, K Back Scale [ S, L, T ] D Stock Dimensions (mm): 280 x 28.5 x 8.5  Case Logo
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 S521 SIC 1020 Basic Beginner (Logo) | SIC 1020 Basic Beginner sn90306 Made in Japan by Relay/Ricoh for SIC - code HK-3 Front Scale A, [ B, CI, C ] D, K Back Scale [ S, L, T ] D Stock Dimensions (mm): 280 x 28.5 x 8.5 |
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 S511 SIC 1510 Astrolog |
SIC 1510 Astrolog (early) Made in Japan by Relay/Ricoh for SIC - 1961 Logo Front Scale (extended) LL-0, L, K, A [ B, S Cos, ST, T Cot, C ] D, DI, P, LL0 Back Scale LL-1, LL-2, LL-3, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1 Originally part of SIC retail display, Factory stock. Stock Dimensions (mm): 355 x 47 x 7 |
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 S512 SIC 1510 Astrolog (Logo) |
SIC 1510
Astrolog - sn40855 Made in Japan by Relay/Ricoh for SIC - 1961 Front Scale (extended) LL-0, L, K, A [ B, S Cos, ST, T Cot, C ] D, DI, P, LL0 Back Scale LL-1, LL-2, LL-3, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1 Originally part of SIC retail display, Factory stock. Stock Dimensions (mm): 351 x 47 x 7 |
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 S515 SIC 1520 |
SIC 1520 Master Trig (early) Made in Japan by Relay/Ricoh for SIC - 1961 Front Scale K, A [ B, S Cos, ST, T Cot, C ] D, DI Back Scale DF [ CF, CIF, CI, C ] D, L Stock Dimensions (mm): 322 x 40 x 7 |
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 S516 SIC 1520 Multiphase Deca Trig (Logo) |
SIC 1520 Multiphase DecaTrig - S/N 30180 Made in Japan by Relay/Ricoh for SIC - 1961 Front Scale K, A [ B, S Cos, ST, T Cot, C ] D, DI Back Scale DF [ CF, CIF, CI, C ] D, L New Factory Box Stock Dimensions (mm): 320 x 40 x 7 |
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 S513 SIC 1530 Technilog |
SIC 1530 Technilog - (early) Made in Japan by Relay/Ricoh for SIC - 1961 Front Scale LL0, K, A [ B, S Cos, ST, T Cot, C ] D, DI, LL00 Back Scale L, LL1, DF [ CF, CIF, CI, C ] D, LL3, LL2 Stock Dimensions (mm): 322 x 39.5 x 7 |
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 S514 SIC 1530 Technilog (Logo) |
SIC 1530 Technilog - S/N 30805 Made in Japan by Relay/Ricoh for SIC - 1961 Front Scale LL0, K, A [ B, S Cos, ST, T Cot, C ] D, DI, LL00 Back Scale L, LL1, DF [ CF, CIF, CI, C ] D, LL3, LL2 Stock Dimensions (mm): 319 x 40.5 x 7 |
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 S510 SIC 1570 Electro Vector Log Log |
SIC 1570 Electro Vector Log Log (early) Made in Japan by Relay/Ricoh for SIC - 1961 Front Scale Sh1, Sh2, A [ B, K, Th, C ] D, Tr1, Tr2, db Back Scale (Note: special LL' scale on C scale) Sr, Sθ Sθ, P', P [ Q, CF, CI, C LL' ] D, DF, LL2, LL3 Originally part of SIC retail display, Factory stock. Stock Dimensions (mm): 355 x 47 x 7 |
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 S509 SIC 1570 Electro Vector Log Log (Logo) |
SIC 1570 Electro Vector Log Log - sn30512 Made in Japan by Relay/Ricoh for SIC - 1961 Front Scale Sh1, Sh2, A [ B, K, Th, C ] D, Tr1, Tr2, db Back Scale (Note: special LL' scale on C scale) Sr, Sθ Sθ, P', P [ Q, CF, CI, C LL' ] D, DF, LL2, LL3 New Factory Box Stock Dimensions (mm): 351 x 47 x 7 |
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 S517 SIC 1580 Electro Vector Log Log DecaTrig |
SIC 1580 Electro Vector Log Log DecaTrig (early) Made in Japan by Relay/Ricoh for SIC - 1961 Front Scale (extended) Sh2, Sh1, Th, A [ BI, S Cos, T Cot, CI, C ] D, LL3, LL2, LL1 Back Scale X2, X1, P2, P1 [ Q, Y, L, LX, I ] I, Lθ1<45 Lθ1>45, Lθ2>45 Lθ2<45, LY Originally part of SIC retail display, Factory stock Stock Dimensions (mm): 355 x 46.5 x 7 |
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 S518 SIC 1580 Electro Vector Log Log DecaTrig (Logo) |
SIC 1580 Electro Vector Log Log DecaTrig sn30152 Made in Japan by Relay/Ricoh for SIC - 1961 Front Scale (extended) Sh2, Sh1, Th, A [ BI, S Cos, T Cot, CI, C ] D, LL3, LL2, LL1 Back Scale X2, X1, P2, P1 [ Q, Y, L, LX, I ] I, Lθ1<45 Lθ1>45, Lθ2>45 Lθ2<45, LY New Factory Box Stock Dimensions (mm): 352 x 46.5 x 7 |
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 C31 SIC 1610 1962 5"(Rotolog 400) |
SIC 1610 (logo) 1962 5"(Rotolog 400) Made in Japan for Scientific Instruments Co. Front Scale LL3, LL2, LL1, LL0, K, A, D ( C, CI, B, EI(spiral) ) Back Scale LL03, LL02, LL01, LL00, L, DI, D, T, S, T, S, T, TS ) New Factory Box Stock Dimensions (mm): 128 Dia x 4 |
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 C33 SIC 1610 1962 5"(Rotolog 400) |
SIC 1610 (logo) 1962 5" (Rotolog 400) Made in Japan for Scientific Instruments Co. Front Scale LL3, LL2, LL1, LL0, K, A, D ( C, CI, B, EI(spiral) ) Back Scale LL03, LL02, LL01, LL00, L, DI, D, T, S, T, S, T, TS ) New Factory Box Stock Dimensions (mm): 128 Dia x 4 |
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 C34 SIC 1610-D Duplex 5" (Rotolog 500) |
SIC 1610-D Duplex 1963 5" (Rotolog 500) Made in Japan for Scientific Instruments Co. Front Scale LL3, LL2, LL1, LL0, K, A, D ( C, CI, B, EI(spiral) ) Back Scale LL03, LL02, LL01, LL00, P, L, DI, D ( C, T, S, T, S, T, TS ) Stock Dimensions (mm): 128 Dia x 4  Box
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 P246 SIC 4030 Junior Mannheim - early | SIC 4030 Junior Mannheim - early Made in Japan by Relay/Ricoh for SIC - 1961 Front Scale 4in // A, [ B, CI, C ] D ||10cm Back Scale [ S, L, T ] D New Factory Box Stock Dimensions (mm): 118 x 19[23] x 6 |
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 P247 SIC 4030 Junior Mannheim (Logo) | SIC 4030 Junior Mannheim - sn30662 Made in Japan by Relay/Ricoh for SIC - 1961 Front Scale 4in // A, [ B, CI, C ] D ||10cm Back Scale [ S, L, T ] D New Factory Box Stock Dimensions (mm): 118 x 19[23] x 6 |
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 P248 SIC 5050 Pocket Mannheim | SIC 5050 Pocket Mannheim - early Made in Japan by Relay/Ricoh for SIC - 1961 Front Scale 13cm // A, [ B, CI, C ] D, K || 5in Back Scale [ S, L, T ] D New Factory Box Stock Dimensions (mm): 148 x 24[29] x 7 |
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 P249 SIC 5050 Pocket Mannheim (Logo) | SIC 5050 Pocket Mannheim sn40116 Made in Japan by Relay/Ricoh for SIC - 1961 Front Scale 13cm // A, [ B, CI, C ] D, K || 5in Back Scale [ S, L, T ] D New Factory Box Stock Dimensions (mm): 148 x 24[29] x 7 |
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 P250 SIC 4500 Junior Multiphase | SIC 4500 Junior Multiphase Made in Japan by Relay/Ricoh for SIC Berkeley, California Front Scale A, [ S, L, T ] D Back Scale DF [ CF, CI, C ] D New Factory Box Stock Dimensions (mm): 155 x 25 x 5 |
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 P243 SIC - Scientific Instruments 4500 | SIC 4500 Made in Japan by Relay/Ricoh for SIC Berkeley, California Front Scale A, [ S, L, T ] D Back Scale DF [ CF, CI, C ] D Originally part of SIC retail sales display Stock Dimensions (mm): 155 x 25 x 5 |
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 P251 SIC 4500 Junior Multiphase (Logo) | SIC 4500 Junior Multiphase - sn30461 Made in Japan by Relay/Ricoh for SIC Front Scale A, [ S, L, T ] D Back Scale DF [ CF, CI, C ] D New Factory Box Stock Dimensions (mm): 155 x 25 x 5 |
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 P242 SIC - Scientific Instruments 5500 | SIC 5500 Made in Japan by Relay/Ricoh (#550) branded for SIC Front Scale A, [ B, S, T, C ] D, K Back Scale DF [ CF, CI, C ] D, L Originally part of SIC retail sales display Stock Dimensions (mm): 175 x 24.5 x 4.8 |
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 P252 SIC 5500 Pocket Multiphase | SIC 5500 Pocket Multiphase early Made in Japan by Relay/Ricoh for SIC Front Scale A, [ B, S, T, C ] D, K Back Scale DF [ CF, CI, C ] D, L New Factory Box | ||
 P253 SIC 5500 Pocket Multiphase | SIC 5500 Pocket Multiphase sn31086 Made in Japan by Relay/Ricoh for SIC Front Scale A, [ B, S, T, C ] D, K Back Scale DF [ CF, CI, C ] D, L New Factory Box | ||
 P241 SIC 5510 Astrolog 5 |
SIC 5510 Astrolog 5 (early) Made in Japan by Relay/Ricoh for SIC - 1961 Front Scale (extended) LL-0, L, K, A [ B, S Cos, ST, T Cot, C ] D, DI, P, LL0 Back Scale LL-1, LL-2, LL-3, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1 New Factory Box Stock Dimensions (mm): 170 x 35.5 x 5 |
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 P245 SIC 5510 Master Log Log Decatrig (Logo) |
SIC 5510 Master Log Log Decatrig sn40479 Made in Japan by Relay/Ricoh for SIC - 1961 Front Scale (extended) LL-0, L, K, A [ B, S Cos, ST, T Cot, C ] D, DI, P, LL0 Back Scale LL-1, LL-2, LL-3, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1 New Factory Box Stock Dimensions (mm): 170 x 35.5 x 5 |
 Two types of Packaging Yellow/blue most recent |
 Circular SR Packaging Orange SINCO most recent |
 SINCO Ad - August 1965 |
 SIC Models 1966 |
 SINCO Circular Rotorules |
 SINCO Slide Rules |
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