
![]() S571 Alvin 1150 Elite Decilog |
Alvin 1150 Elite Decilog Made in Japan by Relay (RS-6) for Alvin 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 Multilined Cursor: Kw, HP, etc. |
![]() P210 Arthur Brown & Bro 7993A |
Arthur Brown & Bro 7993A Made in USA (looks like by Bruning) Front Scale : 12.5cm // A [ B, CI, C ] D, K \\ 5in Back Scale : S, L, T Back: Blank |
![]() P055 Charles Bruning 2401 |
Charles Bruning 2401 - Simplex - Made in USA - Advertising use Front Scale 12.5cm // A [ B, CI, C ] D, K \\ 5in Back Scale: [S, L, T ] Back Blank ![]() Note: Body same as Post 1444P |
![]() P163 Charles Bruning 2401 Dravo |
Charles Bruning 2401 - Dravo - Simplex Made in USA - Advertising use Front Scale 12.5cm // A [ B, CI, C ] D, K \\ 5in Back Scale: [S, L, T ] Back Adv/sleeve: Dravo |
![]() P056 Charles Bruning [Unmarked 2401] |
Charles Bruning 2401 - Simplex Made in USA - Advertising use - Body same as Post 1444P Front Scale 12.5cm // A [ B, CI, C ] D, K \\ 5in Back Scale: [S, L, T ] Back Adv: J.A. MacGuire & Co. |
![]() S108 Charles Bruning 2420 |
Charles Bruning 2420 - Simplex - Made in USA Front Scale 10inch // A [ B, CI, C ] D, K \\ 25cm Back Scale: [S, L, T ] Back: Conversion Table |
Charvoz-Roos![]() REF Charvoz-Roos Company PSR-102 |
Charvoz-Roos Company PSR-102 Made in USA by Charvoz-Roos - c1946 Front Scale A [ B, CI, C ] D, K Back Scale: [S, L, T ] Back: Equivalents of Units Archive - Tom Dilatush collection |
![]() REF The Roos Company SR-104 |
The Roos Company SR-104 Made in USA by The Roos Company - c1941 Front Scale A [ B, CI, C ] D, K Back Scale: [S, L, T ] Back: Equivalents of Units Archive - Chris Gillings collection |
![]() S233 Charvoz-Roos SR-105 |
Charvoz-Roos SR-105 Made in USA by Charvoz-Roos - c1946 Front Scale A [ B, CI, C ] D, K Back Scale: [S, L, T ] Back: Equivalents of Units Channel: Fractional to Decimal |
![]() REF Charvoz Roos SR-107A |
Charvoz Roos SR-107A Made in USA by The Roos Company - c1946 Front Scale 10inch // A [ B, CI, C ] D, K || 25cm Back Scale: [S, L, T ] Back: Equivalents of Units Archive - Tom Dilatush collection |
![]() S563 Charvoz-Roos SR-105D |
Charvoz-Roos SR-105D (Duplex style)- c1949-1952 Made in USA by Acu-Design (Acu-math) Designed by Wilfred Boos Front Scale A [ B, CI, C ] D, K Back scale: Equivalents [S, L, T ] Equivalents ![]() Note: Unique S&T rear Hairline. |
![]() S395 Charvoz-Roos SR-105M |
Charvoz-Roos SR-105M Made in USA - Note: same as Dietzgen 1767P (see S001) Front Scale A [ B, CI, C ] D, K Back Scale: [S, L, T ] Back: Equivalents of Units Channel: Fractional to Decimal Note: Metal reinforcement in well |
![]() P100 Charvoz-Roos SR-108 Duplex |
Charvoz-Roos SR-108 Duplex (Metal Ends)- c1945 Made in USA - scales set up as if it's a 10inch scale Front Scale K, A [ B, S, T, C ] D, DI Back Scale Fraction-Decimal[ L, C2, C1 ] D1, D2, D |
![]() P101 Charvoz-Roos SR-108 Duplex |
Charvoz-Roos SR-108 (Plastic Ends)-c1944 Made in USA - scales set up as if it's a 10inch scale Front Scale K, A [ B, S, T, C ] D, DI Back Scale Fraction-Decimal [ L, C2, CI ] DI, D2, D |
![]() S449 The Roos Company SR-109 |
The Roos Company SR-109 Duplex - c1941 Made by The Roos Company prior to Charvoz-Roos merger (1946) Material: Wood stock with plastic laminate, plastic end pieces Front Scale (Scale similar to Post 1457) T Cot, DF [ CF, CIF, CI, C ] D, S Cos, ST Back Scale Fraction-Decimal [ B, K, L, C ] Trig identities |
![]() S407 Charvoz-Roos SR-109 |
Charvoz-Roos SR-109 Duplex (Wood Stock) Note: The red stain comes from the sleeve Material: Wood stock with plastic laminate Front Scale (Scale similar to Post 1457) T Cot, DF [ B, K, L, C ] D, S Cos, ST Back Scale Fraction-Decimal [ CF, CIF, CI, C ] Trig identities |
![]() S397 Charvoz-Roos SR-109 |
Charvoz-Roos SR-109 Duplex (Metal Stock) Made in USA (possibly with Acu-Design parts) Note: Magnesium stock with plastic laminate - Cursor same as Acu-Math 90 Front Scale (Scale similar to Post 1457) T Cot, DF [ B, K, L, C ] D, S Cos, ST Back Scale Fraction-Decimal [ CF, CIF, CI, C ] Trig identities |
![]() S369 Charvoz-Roos SR-111 Trig-O-Log |
Charvoz-Roos SR-111 Trig-O-Log Made in USA (Henschel?) Front Scale LL0, LL00, A [ B, K, CI, C ] S, ST, T Back Scale L, LL1, DF [ CF, CIF, CI, C ] D, LL3, LL2 Original owner: Carol Van Hoozel Warning: Clean carefully - not engine divided |
![]() REF Charvoz-Roos (SR-113) SuperTrig |
Charvoz-Roos (SR-113) SuperTrig - c1946 Made in USA - Celluloid laminate over wood Front Scale LL0, LL00, A [ B, K, CI, C ] D, S, ST, T Back Scale L, LL1, DF [ CF, CIF, CI, C ] D, LL3, LL2 Identical to WWII era Post 1462 Archive - Tom Dilatush Collection |
![]() S344 Charvoz-Roos SR-113 SuperTrig |
Charvoz-Roos SR-113 SuperTrig - c1950 Made in USA - All Plastic stock and slide Front Scale LL0, LL00, A [ B, K, CI, C ] D, S, ST, T Back Scale L, LL1, DF [ CF, CIF, CI, C ] D, LL3, LL2 Original owner: Joseph Ferguson, Belwood, Ontario, Canada Warning: Do not clean this model - not engine divided |
![]() S553 Climatemaker Heat Loss Calculating Rule
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Climatemaker Heat Loss Calculating Rule - 1938 Made in USA by Climatemaker Corp., 1804 WestEnd Ave, Nashville, Tennessee
Front Scale |
![]() P119 Compass 505 |
Compass 505 Made in Japan by Relay/Ricoh Front Scale 13cm // A [ B, CI, C ] D, K || 5in Back scale: [S, L, T ] Back: Calculating Guide formulas |
![]() P119 Compass 1018 |
Compass 1018 Made in USA - NY - probably by Bruning Front Scale 12.5cm // A [ B, CI, C ] D, K \\ 5in Back Scale: [S, L, T ] Back: Blank |
![]() S506 Compass 1315 |
Compass 1315 Made in Japan by Relay/Ricoh Front Scale A [ B, CI, C ] D, K Back Scale: [S, L, T ] Back: Equivalents |
![]() S231 Compass 1321 Log Log |
Compass 1321 Log Log Made in Japan (FK1) for Compass Instruments Front Scale LL0, LL00, A [ B, K, CI C ] D, S, ST, T Back Scale L, LL1, DF [ CF, CIF, CI, C ] D, LL3, LL2 |
![]() P205 C-Thru No. 27 Pocket |
C-Thru No. 27 (Sheet Plastic Slide Rule) Made in USA - C-Thru Ruler, Bloomfield, Connecticut Front Scale : A [ 5in, B, CI, C, 12.5cm ] D Back Scale : S, L, T Well: Units Equivalants Back Slide: Decimal Equivalents
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![]() S374 C-Thru No.88 |
C-Thru No.88 (Sheet Plastic Slide Rule) Made in USA - C-Thru Ruler, Bloomfield, Connecticut Front Scale : A [ 10in, B, CI, C, 25cm ] D, K Back Scale : S, L, T Well: Units Equivalants Back Slide: Decimal Equivalents |
![]() REF C-Thru S-889 |
C-Thru S-889 Made in Japan for C-Thru Ruler, Hartford, Connecticut Front Scale LL01, K, A [ B, T, ST, S ] D, L, LL1 Back Scale LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2 Archive - Rod Lovett Collection |
![]() S370 C-Thru S-890 |
C-Thru S-890 Made in Japan for C-Thru Ruler, Hartford, Connecticut Front Scale LL01, K, A [ B, T, ST, S ] D, LL3, LL2 Back Scale LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2 |
![]() C02 C-Thru S-96 Circular 6in dia |
C-Thru S-96 Circular 6in dia Made in USA - C-Thru Ruler Company, Hartford, Conn. Front Scale: K, D, ( C, B, A, CI, L) Back Scale: S, L, T Back: Instructions |
Dieterich-Post Co. (DIEPO)![]() REF Dieterich-Post 3060P |
Dieterich-Post 3060P Made in USA for Dieterich-Post - This looks like a Charles Bruning Model Front Scale 10in // A [ B, CI, C ] D, K \\ 25cm Back scale: TBD ![]() 1960 Dieterich-Post Catalog |
Disney![]() S269 Disney Mickey Mouse Slide Rule |
Though not logarithmic based, these Disney slide rules may have kick started many engineering and scientific careers. Disney Mickey Mouse Slide Rule |
![]() S350 Disney Mickey Mouse Disneyland |
Disney Mickey Mouse Disneyland Made in Hong Kong for Walt Disney Co. Front Scale Addition and Subtraction, Fahrenheit to Celsius Conversion Back scale: Multiplication and Division, Inch to Centimeter conversion Misc. Conversion Table |
![]() S269 Disney Mickey Math Slide Rule |
Disney Mickey Math Slide Rule Made in USA for Walt Disney Co. Front Scale Addition and Subtraction, Fahrenheit to Celsius Conversion Back scale: Multiplication and Division, Inch to Centimeter conversion Misc. Conversion Table |
![]() S534 Snoopy Slide Rule |
Snoopy Slide Rule Made in USA for United Feature Syndicate. Front Scale Addition and Subtraction, Fahrenheit to Celsius Conversion Back scale: Multiplication and Division, Inch to Centimeter conversion Misc. Conversion Table |
Easterly (John I.) Mfg.![]() REF Easterly Rafter Calculator |
Easterly Rafter Calculator Made in USA - Designed and built by John I, Easterly, Healdsburg, CA 1940 Front Scale [Scale A Length ] Common Rafter, Hip-Valley, Scale B Instructions Archive - Clay Castleberry Collection |
![]() REF Easterly Rafter Calculator |
Easterly Rafter Calculator Made in USA - Designed and built by John I, Easterly, Healdsburg, CA c1941-1954 Front Scale [Scale A Length ] Common Rafter, Hip-Valley, Scale B Instructions Archive - Clay Castleberry Collection |
![]() REF Easterly Rafter Framer - Pickett 1082 |
Easterly Rafter Framer - Pickett 1082 Made in USA by Pickett - Designed by John I, Easterly, Watsonville, CA c1957 Front Scale CR (Common Rafter) Hip-Valley Scale [ G ] H Back scale CR (Common Rafter) Hip-Valley Scale [ E ] F Archive - Clay Castleberry Collection |
![]() P151 Empire Pedigree Pocket |
Empire Pedigree Pocket Made in USA - Empire Pencil Co., Shelbyville, NY Front Scale A [ B, CI, C ] D, K Back Scale: [S, L, T ] Note: Red scales in this instance for cost reduction, not necessarily for denoting inverted scales. |
![]() P186 Empire Pedigree Precision |
Empire Pedigree Precision Made in USA - Empire Pencil Co., Shelbyville, NY Front Scale A [ B, CI, C ] D, K Back Scale: [S, L, T ] |
![]() S157 Empire Pedigree 240 |
Empire Pedigree 240 (retail package) Made in USA - Empire Pencil Co., Shelbyville, NY - retail package Front Scale A [ B, CI, C ] D, K Back Scale: [S, L, T ] Note: Red scales in this instance for cost reduction, not necessarily for denoting inverted scales. |
![]() REF Engineering Sales Co., No. 6004 |
Engineering Sales Co., No. 6004 - c1945 Made in USA for Engineering Sales by Acu-Design Note: Red lettering faded - Brand can be seen in bright light Front Scale (Scale similar to Post 1457, Charvoz-Roos 109) T Cot, DF [ B, K, L, C ] D, S Cos, ST Back Scale Fraction-Decimal [ CF, CIF, CI, C ] Trig identities Archive - Belongs to Jaan Raamot, Retired EE (Avia in Colorado) |
![]() REF Gerber Variable Scale |
Gerber Variable Scale - Type TP007100B Made in USA - Gerber Scientific Instrument Company Scales (23.5 cm): R1, I, L10 Archive - Rod Lovett collection Notes: The heart of the Variable Scale is a high precision triangular spring whose coils act as calibrating lines. When extended, all coils are equally spaced. A second spring carries numerical markings for each 10th coil of the triangular spring. More |
![]() P213 Globemaster 62200 |
Globemaster 62200 Made in USA Front Scale :A [ B, CI, C ] D, K Back: Blank |
![]() P118 Guedon Metal pocket |
Guedon Metal pocket Made in USA Camden, NJ - all sheet metal construction Front Scale A [ B, CI, C ] D Front Scale: Conversions Back: 5in(fractions) 125mm |
![]() P176 Guedon - S.G.D.G. MARC |
Guedon - S.G.D.G. MARC Made in France (Unis) for Guedon, Schenectady N.Y. Front Scale 5in // A [ B, C ] D Back: 13cm |
![]() P062 Guedon Plastic Pocket |
Guedon Plastic pocket - Closed simplex Made in France for Guedon, Camden N.J. Front Scale A [ B, C ] D Back: Decimal Equivalents |
![]() P153 Guedon Plastic Pocket |
Guedon Plastic pocket - with scale Made in France for Guedon, Camden N.J. Front Scale 5.5in // A [ B, C ] D Back: Decimal Equivalents |
![]() P153 Guedon (Cole Electric Products) |
Guedon (Cole Electric Products) Made in France for Guedon, Camden N.J. Front Scale 5.5in // A [ B, C ] D Back Scale: 15cm Back Adv: Cole Logo, Owner: F.Latzler |
![]() P234 (Guedon) Dietzgen 1765F |
(Guedon) Dietzgen 1765F Made in France for Dietzgen by Unis MARC Front Scale 5in // A [ B, C ] D Back Scale: 13cm [ Blank ] |
![]() P116 Henschel 1087A |
Henschel 1087A - Simplex - Made in USA Front Scale A [ B, CI, C ] D, K Back Scale: [S, L, T ] Back: Conversion Table Warning: Do not clean this model using Windex w/ Ammonia-D. This is not an engine-divided rule and the ink wipes off. (Found out too late - ouch) |
![]() S197 Henschel 2020P |
Henschel 2020P - Duplex Made in USA Front Scale LL0, LL00, A [ B, K, CI, C ] S, ST, T Back Scale L, LL1, DF [ CF, CIF, CI, C ] D, LL3, LL2 Warning: Do not clean this model using Windex w/ Ammonia-D. This is not an engine-divided rule and the ink wipes off. (You'd think I'd learn) |
![]() P123 Indeco Pocket |
Indeco Pocket - Simplex Made in USA - a clever combination of SS and plastic Front Scale A [ B, C ] D Back: Blank |
![]() S472 Jason 800 |
Jason 800 Made in Japan for Jason by Relay/Ricoh Front Scale A [ B, CI, C ] D, K Back Scale [ S, L, T ] Back: Equivalents ![]() |
![]() S337 Kel-Co Class Calculator For Thoroughbred Race Horses |
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Kel-Co Class Calculator For Thoroughbred Race Horses Made in USA - Kel-Co Publishing Plainview, NY - 1971 Front Scale FI (Finish Value), W(#wins) [ T (Track T1, T2, T3, T4), F2 ] [ E (Earnings) ] Clever 2-Slide Extruded PVC construction |
![]() C06 Leitz 3625-20 8.4cm |
Leitz 3625-20 8.4cm Dia Made in Japan - 8.4cm[ Dia Front Scale D ( C, CI, A, K ) Back: equivalents |
![]() S124 Leitz 3054L |
Leitz 3054L - Duplex Made in Germany Front Scale K, A [ B, S, T, CI ] D, L Back Scale DF [ CF, CIF, C ] D |
![]() P124 Master Electric |
Master Electric - Simplex Made in USA by Master Electric - Dayton, Ohio Front Scale 5in // A [ B, C ] D Back scale: [S, L, T ] Back adv: Master Electric Motors Warning: Do not clean this model using Windex w/ Ammonia-D. This is not an engine-divided rule and the ink wipes off. (Previous owner did it) Denatured Alcohal is OK. |
![]() P239 Master Electric |
Master Electric - Simplex Made in USA by Master Electric - Dayton, Ohio Front Scale 5in // A [ B, C ] D Back scale: [S, L, T ] Back adv: Master Electric Motors |
![]() REF - Novotni Weight Slide Rule (Bakelite) |
Novotni Weight Slide Rule - Dual Slides Made in USA - Novotni Slide Rule Co. - Media, PA. Ca. 1920 Material: Black Bakelite, Gold silkscreen. Front Scale Thickness [ Width, Length ] [ Shape, Material ] Weight (lbs) Back: Blank Manual recommends this "...for use in a Blacksmith shop" Archive - Donated to the Smithsonian National Museum , Washington, D.C. |
![]() S340 Novotni Weight Slide Rule (Masonite) |
Novotni Weight Slide Rule - Dual Slides Made in USA - Novotni Slide Rule Co. - Media, PA. ca. 1959 Material: Masonite wood fiberboard, Black on white silkscreen. Front Scale Thickness [ Width, Length ] [ Shape, Material ] Weight (lbs) Back: Blank Manual changed with the times " ... for use in a Forging shop" |
![]() P188 Prestige Precision - North American Engines |
Prestige Precision - North American Engines Made in USA for N.A. Engines, Philadelphia, PD. Front Scale K, A [ B, CI, C ] D, L Back Adv: North American Engines Co. Inc. |
![]() S245 Sans & Streiffe_310 |
Sans & Streiffe 310 Made in Japan by Relay (GK-3) for Sans & Streiffe Front Scale (extended) 25cm // K, A [ B, CI, C ] D, L || 10inch Back Scale [ S, S&T, T ] |
![]() S435 Sans & Streiffe 311 |
Sans & Streiffe 311 Made in Japan by Relay (QS-2) for Sans & Streiffe 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 |
![]() S320 Sans & Streiffe 312 |
Sans & Streiffe 312 Made in Japan by Relay (JS-3) for Sans & Streiffe Front Scale LL0, L, A [ B, S, ST, T, C ] D, DI, P, LL0 Back Scale LL1, LL2, LL3, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1 |
SKYLINE Distributors
![]() REF Skyline Technolog 151 |
Skyline Technolog 151 - dc P.S-4 (1967) Made in Japan by Relay (PS-4) for Skyline Distributors, Denver, CO Front Scale (extended) LL-0, L, K, A [ B, S Cos, ST ST, T COT, D ] D, DI, P, LL0 Back Scale (extended) LL-1, LL-2, LL-3, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1 Donated by Bill Boas, Lakewood, CO. Purchased in 1993 directly from the Skyline store in Denver before they ended the business ![]() |
![]() S556 SR&SE Co - Concrete Quantity Calculator Full Size Flyer 7.77MB |
SR&SE - Concrete Quantity Calculator - 1940 Made in USA by Slide Rule & Scale Engineering Co., Laporte, IN Front Scale (extended) Thickness [ Width, Length ] Cubic Yards Back: Instructions back Adv: The Master Builders Company, Chicago, Illinois Instructions 562KB |
![]() REF SR&SE Co - Concrete Quantity Calculator |
SR&SE - Concrete Quantity Calculator - c1944 Made in USA by Slide Rule & Scale Engineering Co., New Carlisle, IN Front Scale (extended) Thickness [ Width, Length ] Cubic Yards Back: Instructions back Adv: Consumers Company, Chicago, Illinois Instructions |
![]() S156 Tru-Bilt 79CB |
Tru-Bilt 79CB Made in USA - retail package Front Scale S, K, A [ B, CI, C ] D, L, T Back blank |
![]() S309 U.S. Blue 1876 |
US Blue 1876 Made in Japan by Hemmi for U.S. Blue Co., Chicago Front Scale A [ B, C ] D Back Scale [ S, L, T ] ![]() |
F. Weber & Co.![]() S568 Weber 4280-A |
Weber 4280-A - c1930 Made in USA - Same as Post 1457, Charvoz-Roos 109 Material: Wood stock with plastic laminate Front Scale T Cot, DF [ CF, CIF, CI, C ] D, S Cos, ST Back Scale Fraction-Decimal [ B, K, L, C ] Trig identities Original Owner: E. Ewan, 1472 S0. 303 rd., Auburn, WA (on case) |
![]() S158 Weber 4281-S Students Slide Rule |
Weber 4281-S - Students Slide Rule - c1930 Made in USA - Philadelphia Front Scale A [ B, CI, C ] D, K Back Scale: [S, ref, T ] |
![]() S547 Weber 4285N |
Weber 4285N Made in Germany by Nestler for F.Weber Front Scale K, A [ B, CI, C ] D, L Back Scale: 29.5cm [S, S&T, T ] 11-5/8 inch Multiple Hairlind Cursor Original Owner: Rigterink (on case) |
![]() REF Weber 4287 Pocket |
Weber 4287 Pocket Made in Germany by A. Nestler for F.Weber Front Scale A [ B, C ] D Back scale: 11cm [S, S&T, T ] 4.5in Archive - Scan provided by Mark D. Sutton |
![]() S417 Weber 4288 Rietz |
Weber 4288 Rietz Made in Germany by A. Nestler for Weber (similar to Nestler 23R) Front Scale (extended) 11in // K, A [ B, CI, C ] D, L || 1:25 Back scale: [S, S&T, T ] Well: 55cm Back: Equivalents (English) Multi-lined Cursor |
![]() P229 Weber 42121 N |
Weber 42121 N Made in Germany by A. Nestler for Weber (similar to Nestler 021) Front Scale (extended) 5in // P, K, A [ B, CI, C ] D, S, T Back Scale [ LL1, LL2, LL3 ] Multi-lined cursor |
![]() P126 Atlas 51 | Atlas 51 Made in Japan Front Scale A, [ B, CI, C ] D, K Back Scale: [ S, L, T ] Sleeve adv: Tower Const. Co. Sioux City, Iowa |
![]() P067 Atlas-Copco Fluidics |
Atlas-Copco Fluidics - Closed simplex Made in Sweden - Text in Spanish Front Scale ΔP1, ΔP [ d, P, L ] Q, Q1 Back Scale [d, P1, L1 ] Original owner: UNK/Peru |
![]() P212 Concrete Volume Computer | Concrete Volume Computer 1995 - 8 inch long Made in USA by Louis Gerson Co, Middleboro, MA 02346 Front Scale A(Thickness) [ B(Width), C(Length) ] D(Cubic Yards), E(Dia-Inches) Back Scale: Estimates for cubic yard Back adv: Lyman-Richey Sand & Gravel, Omaha, NB 68131 |
![]() P015 Dr. Seehas Pocket |
Dr. Seehas Pocket - Advertising - Simplex - Made in USA Front Scale A [ B, C ] D Back: Hardwick Hindle Inc. Resistors |
![]() P117 Dupa 012b General Electric | Dupa 012b General Electric Made in Germany Front Scale F, A, [ B, CI, C ] D, E Back Scale: Blank Back adv: General Electric Original Owner: R.M. Hull |
![]() P187 Fawick Airflex | Fawick Airflex Made in Japan for U.S. Company Front Scale A, [ B, CI, C ] D, K Back Scale: [ S, L, T ] Back adv: Fawick Airflex Industrial Clutches and Brakes |
![]() P152 General Electric Cable Calculator | General Electric Cable Calculator Made in USA Front Scale A, [ B, C ] D, E Back Scale: Wire Current Capacities Back adv: Wire Gage Working Table |
![]() P213 Globemaster 62200 | Globemaster 62200 Made in Japan for Globemaster Front Scale A, [ B, CI, C ] D, K Back Scale: Blank Sleeve adv: Globemaster 5" Plastic Slide Rule |
![]() P144 Johnston Bros |
Johnston Bros - Simplex Made in USA - Probably by Sterling Front Scale A [ B, CI, C ] D, K Back Adv: Johnston Bros, Ferrysburg, Michigan |
![]() P181 RCA 551 |
RCA 551 - Duplex Best Guess this was made in Japan by Relay/Ricoh for RCA Front Scale K, A [ B, S, T, C ] D, DI Back Scale DF [ CF, CI, C ] D, L |
![]() P166 SKF [ Early Hemmi 74 Variant ] |
SKF [ Early Hemmi 74 Variant ] Made in Japan by Hemmi for SKF Ball Bearings Front Scale (Extended) 14cm // K, A [ B, CI, C ] D, L Back Scale [ S, S&T, T ] Back Adv: SKF |
![]() P145 Swinston - Mesta |
Swinston - Mesta Made in Germany for Swinston, Pittsburgh, PA, USA Front Scale [Extended] 5in // K, A [ B, C ] D Back Scale: Blank Back Adv: Mesta Machine Co., Pittsburgh, PA |