|
| SIC slide rules were manufactured for Scientific Instruments in Berkeley, California by Japanese manufacturers Relay/Ricoh and Concise. SIC had custom models which added scale labels to the cursors, a handy, yet costly, technique which was never duplicated on other brands or by other manufacturers. Note that on slide rules that have the SIC Diamond Logo, the rules have serial numbers but do not have the pi (π) gauge mark on the A and B scales found on earlier slide rules without logos. The linear SIC Models numbers are normally a Relay model number with an extra zero (Relay 102 = SIC 1020). |
 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 |
||
 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
|
||
 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
|
||
 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 |
||
 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) |
||
 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
|
||
 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 |
||
 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 |
||
 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
|
||
 ISRM SIC (Relay) 153 Master Trig |
SIC (Relay) 153 Master Trig Made in Japan by Relay dc HS-2 (1957) for S.I.C. (Scientific Intruments Inc) in Berkely, CA Front Scale K, A [ B, S, ST, T C ] D, DI Back Scale L, LL1, DF [ CF, CIF, CI, C ] D, LL3, LL2 Donated by David Hecht, Alexandria, VA |
||
 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 |
||
 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
|
||
 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 |
||
 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 |
||
 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 |
||
 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 |
||
 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 |
||
 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 |
||
 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, 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 |
||
 ISRM SIC 1530 Technilog |
SIC 1530 Technilog Made in Japan by Relay/Ricoh for SIC - 1961 Front Scale LL0, LL00, A [ B, K, CI, C ] D, S Cos, ST, T Cot Back Scale L, LL1, DF [ CF, CIF, CI C ] D, LL3, LL2 Stock Dimensions (mm): 319 x 40.5 x 7 Donated by David Hecht, Alexandria, VA |
||
 ISRM SIC 1530 Technilog (Logo) |
SIC 1530 Technilog Made in Japan by Relay/Ricoh for SIC - 1964 Front Scale LL1, K, A [ B, T, T Cot, ST, S Cos, C ] D, DI, LL1, L Back Scale LL2, LL3, DF [ CF, CIF, CI, C ] D, LL3, LL2 Stock Dimensions (mm): 319 x 40.5 x 7 Donated by David Hecht, Alexandria, VA |
||
 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 |
||
 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 |
||
 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 |
||
 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 |
||
 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 |
||
 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 |
||
 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
|
||
 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 |
||
 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 |
||
 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 |
||
 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 |
||
 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 |
||
 P248 SIC 5050 Pocket Mannheim | SIC 5050 Pocket Mannheim - early Made in Japan by Relay/Ricoh for SIC - (c)1961 (no SIC Logo) 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 |
||
 P249 SIC 5050 Pocket Mannheim (Logo) | SIC 5050 Pocket Mannheim sn40116 Made in Japan by Relay/Ricoh - (c)1961 (SIC Diamond Logo on face) 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 |
||
 ISRM SIC 5050 Pocket Mannheim (c)1961 |
SIC 5050 Pocket Mannheim (c)1961 Made in Japan by Relay/Ricoh (SIC Diamond Logo on back) Front Scale 13cm // A [ B, CI, C ] D, K || 5in Back scale: [S, L, T ] Back: Calculating Guide formulas Stock Dimensions (mm): 148 x 24[29] x 7 Donated by David Hecht, Alexandria, Virginia |
||
 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 |
||
 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 |
||
 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 |
Box