Ahrend![]() ISRM Ahrend Sun Hemmi P280 (Ahrend 435660) |
Ahrend Sun Hemmi P280 (Ahrend 435660) Made in Japan by Hemmi for Dutch Company Ahrend - c1973 Front Scale T Cot, K, A [ B, CI, C ] D, L, S Cos, ST ST Back Scale [ LL1, LL2, LL3 ] Donated by David Hecht, Alexandria, VA |
![]() REF Ahrend Hemmi P281 |
Ahrend Hemmi P281 - Open simplex Made in Japan by Sun Hemmi for Dutch Company Ahrend Front Scale T Cot, K, A [ B, CI, C ] D, L, S Cos, ST Back Slider [ LL1, LL2, LL3] Archive - Herman van Herwijnen's SR Catalogue |
![]() REF Ahrend Hemmi P283 |
Ahrend Hemmi P283 - Open simplex Made in Japan by Sun Hemmi for Dutch Company Ahrend Front Scale K, A [ B, CI, C ] D, L, T Cot, S Cos Back Slider [ LL1, LL2, LL3] Archive - Herman van Herwijnen's SR Catalogue |
![]() REF Ahrend Hemmi 642T |
Ahrend Hemmi 642T - Open simplex Made in Japan by Sun Hemmi for Dutch Company Ahrend Front Scale 27cm // K, A [ B, BI, CI, C ] D, DI, L Back Slider [ T2, T1, ST, S] Archive - Herman van Herwijnen's SR Catalogue |
![]() REF Ahrend 649 Schola |
Ahrend 649 Schola Made in Germany for Dutch Company Ahrend Front Scale A [ B, C ] D Archive - Herman van Herwijnen's SR Catalogue |
![]() REF Ahrend 652 Rietz |
Ahrend 652 Rietz Made in Germany for Dutch Company Ahrend Front Scale 26cm // A [ B, C ] D || 10in Back Slider [S, ST, T] Archive - Herman van Herwijnen's SR Catalogue |
![]() REF Ahrend 654 Electro |
Ahrend 654 Electro Made in Germany for Dutch Company Ahrend Front Scale: 26cm // A [ B, C ] D || 10in Well: Dynamo, Volt Back Slider: [S, ST, T] Archive - Herman van Herwijnen's SR Catalogue |
![]() REF Ahrend 690 Electro |
Ahrend 690 Electro Made in Germany (same as Aristo 89) for Dutch Company Ahrend Front Scale: 13cm // K, A [ B, CI, C ] D, L Back Slider: [S, ST, T] Archive - Herman van Herwijnen's SR Catalogue |
![]() REF Ahrend 696 |
Ahrend 654 Made in Germany (same as Aristo 915) for Dutch Company Ahrend Front Scale: 28cm // K, A [ B, BI, CI, C ] D, LL3, LL2, D/M, V Back Slider: [S, ST, L, T] Archive - Herman van Herwijnen's SR Catalogue |
![]() REF Ahrend 701 Technica |
Ahrend 701 Technica Made in Germany (same as Aristo 929) for Dutch Company Ahrend Front Scale: 25cm, P, K, A [ S, T, ST, S ] D, DI, 10in Back Scale: K, DF [CF, CIF, CI, C ] D, L Archive - Herman van Herwijnen's SR Catalogue |
![]() REF Ahrend Construction Disk |
Ahrend Construction Disk Made in Netherlands by Ahrend Archive - Herman van Herwijnen's SR Catalogue |
![]() REF Diwa Log Log 101 |
Diwa Log Log 101 - c1948 Made in Denmark - Wood w/Plastic laminate Front Scale 10in // LL2, A [ B, CI, C ] D, LL3 || K Back Scale (window) [ S, S&T, T ] Back: Equivalents Cursor: 3 hairlines, extended to side (for K scale)
wood case
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![]() REF Diwa 201 Technical |
Diwa 201 Technical - c1955 Made in Denmark - Wood w/Plastic laminate Front Scale 25cm // K, A [ B, CI, C ] D, L Back Scale (window) [ S, S&T, T ] Back: Equivalents Cursor: 3 hairlines Archive Herman van Herwijnen's SR Catalogue |
![]() S244 Diwa Rietz-301 |
Diwa Rietz-301 Made in Denmark - Wood w/Plastic laminate Front Scale 25cm/10in // K, A [ B, CI, C ] D, L Back Scale (window) [ S, S&T, T ] Back: Equivalents Cursor: 3 hairlines |
![]() S315 Diwa 311 Electro |
Diwa 311 Electro - Closed simplex Made in Denmark - Wood w/Plastic laminate Front Scale 25cm/10in // Dynamo/Motor, K, A(kW) [ B(hp), CI, C ] D, Volt, tg ctg, cin cos Back Scale (window) [LL1, LL2, LL3 ] Back: Equivalents Cursor: 4 hairlines |
![]() S283 Diwa Rietz-Ideal No. 1 |
Diwa Rietz-Ideal No. 1 Made in Denmark - All Plastic Front Scale 25cm/10in // L, K, A [ B, CI, C ] D, S, ST, T Back Scale: Blank Cursor: 3 hairlines Original Owner: Hans Christiansen/Rinngade Strauss/Netherlands |
![]() ISRM Diwa 601 |
Diwa 601 Made in Denmark - All Plastic Front Scale 5in // K, A [ B, CI, C ] D, L Back Scale: [ S, S&T, T ] Cursor: 3 hairlines Donated by David Hecht, Alexandria, Virginia Back Advertising: Maxon Premix Burner Co. Muncie, Indiana |
![]() REF Diwa 710 Teknilog |
Diwa 710 Teknilog - Duplex Made in Denmark Front Scale LL00, ST, T, DF [ CF, CIF, CI, C ] D, P, S, LL0 Back Scale LL01, LL02, LL03, A [ B, L, K, C ] D, LL3, LL2, LL1 Cursor: 5 hairlines Archive - Marion Moon Collection |
![]() S336 Diwa 720 Polylog |
Diwa 720 Polylog - Duplex Made in Denmark Front Scale LL00, L, K, A [ B, S, ST, T, C ] D, DI, P, LL0 Back Scale LL01, LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1 Cursor: 5 hairlines |
![]() ISRM Diwa 911 |
Diwa 911 Made in Denmark (closely resembles Dietzgen construction) Front Scale LL0, LL00, A [ B, T Cot, ST, S Cos, C ] D, DI, K Back Scale L, LL1, DF [ CF, CIF, CI, C ] D, LL3, LL2 Donated by David Hecht, Alexandria, VA |
![]() P106 Eco-Bra 1270 |
Eco-Bra 1270 Pocket - Closed simplex Made in Germany - c1940 - all aluminum Front Scale (unmarked) 14cm // A [ B, C ] D Back Adv: Aluminum Company of Canada |
![]() REF Eco-Bra Rietz R141 |
Eco-Bra Rietz R141 Made in Germany - c1960 - Plastic Front Scale 13cm // A [ B, CI, C ] D, K Archive - W. Girbardt (Univ Greifswald, Germany) Collection |
![]() P257 Eco-Bra Darmstadt R143 |
Eco-Bra Rietz R141 Made in Germany - c1960 - Plastic Front Scale 13cm // LL2, LL3, A [ B, CI, C ] D, K, LL1 Back Scale P, T Cot, L, S Cos Back Adv: INA-Nadellager |
![]() P267 Eco-Bra nr1461 System Rietz |
Ecobra nr1461 System Rietz Made in Germany - c1950 - Painted aluminum Front Scale K, A [ B, R, C ] D, lg Back Scale 5in [ sin, tg ] Original location: Netherlands |
![]() REF Eco-Bra 154 Cosmos |
Eco-Bra 154 Cosmos Made in Germany - Plastic - Identical to Hope 530 Front Scale (extended) LL01, LL02, LL03, A [ B, L, K, C ] D, LL3, Ll2, LL1 Back Scale T Cot, ST ST, DF [ CF, CIF, CI, C ] D, P, S Cos Archive - Rod Lovette Collection |
![]() REF Eco-Bra 1500 |
Eco-Bra 1500 Made in Germany - c1940 - all aluminum Front Scale 25cm // K, A [ B, CI, C ] D, L Archive - W. Girbardt (Univ Greifswald, Germany)Collection |
![]() ISRM Eco-Bra 1611 Darmstadt Special |
Eco-Bra 1611 Darmstadt Special Made in Germany - Painted Aluminum Front Scale (extended) T Cot, S Cos, DF [ CF, CI, C ] D, P Back Scale K, A [ B, Lg, C ] LL3, LL2, LL1 Donated by David Hecht, Alexandria, VA |
![]() REF Eco-Bra 1711 Cosmos |
Eco-Bra 1711 Cosmos Made in Germany - Aluminum Front Scale (extended) LL02, LL03, DF [ CF, CIF, L, CI, C ] D, LL3, Ll2, Back Scale LL01, K, A [ B, T<45 Cot, T>45 Cot, ST, S Cos ] D, P, S , LL1 Archive - Rod Lovette Collection |
Fedra
![]() S572 Fedra Log Log |
S572_Fedra Log Log - Closed duplex - DC Aug1968 Made in East Germany possibly by Veb Mantissa Front Scale K, A [ B, CI, C ] D, L Back Scale 27cm, S, ST, T, LL1, LL2, LL3, 10.75Inch Back Slide: [Greek Alphabet] Same as Staedtler Mars 544-52 Log Log Donated by Seth Balish Note: This model of slide rule is available in the Slide Rule Loaner Program |
Friedmann![]() P182 Friedmann 4in Pocket Mannheim |
Friedmann 4in Pocket Mannheim Made in Germany Front Scale A [ B, CI, C ] D, K Back Slider [ S, L, T ] |
Gamma
![]() P014 Gamma Pocket |
Gamma Pocket - Closed simplex Made in Hungary Front Scale (unmarked) 13cm // K, A [ B, CI, C ] D, L Back Slider [ S, S&T, T ] |
Hono-Rietz![]() REF Hono-Rietz Jap.125 |
Hono-Rietz Jap.125 - Closed simplex Possibly made in France by Graphoplex - Sold in Italy (compare cursor design and unconventional scale labels) Front Scale 13cm // B3(K), S, B2(A) [ b2(B), a(CI), b(C) ] B(D), T, L Back TBD Archive - Scarpaz collection (Italy) |
![]() REF Hono-Rietz Jap.125 |
Hono-Rietz Jap.125 - Closed simplex Possibly made in France by Graphoplex - Sold in Italy (compare cursor design and unconventional scale labels) Front Scale 13cm // B3(K), S, B2(A) [ b2(B), a(CI), b(C) ] B(D), T, L Back Adv: Dalmar S.p.a. - Italian hydraulic hose/gasket manufacturer Archive - G. Breda collection (Italy) |
H-H Universum![]() P255 H-H Universum System Rietz |
H-H Universum System Rietz Made in Germany - c1930 Front Scale - Extended 22cm // A [ B, CI, C ] D, L \\ 22cm Back Scale: [ S, T ] Multilined Cursor Back: Conversions (German) |
IWA - Ingenieurerbüro für wirtschafliches Arbeiten![]() REF IWA 0272 Electronic |
IWA 0272 Electronic Made in Germany for Dutch firm De Muiderkring N.V.- c1963 Front Scale - Extended Lambda, Omega, f [ C, L, RC ] L/C, RL Back Scale: K, Sin Cos, A [ B, CI, C ] D, Ln, 25cm Multilined Cursor Archive - scan by Tom Cattrall |
![]() REF IWA 01206 Machining - Roughness Slide Rule for Turning |
IWA 01206 Machining - Roughness Slide Rule for Turning Made in Germany - c1971 Front Scale - Extended 26 cm // r (4 scales), feed [ V in m.min ] Ra, Rt \\ 10.2 inches Back: Direction in English and German Archive - scan by Jim Cerney |
Joe Klawun![]() P258 Joe Klawun No. 666/T |
Joe Klawun No. 666/T - Closed simplex Made in Germany (identical to Nestler 11-ZM) Feinmessinstitut Berlin Charlottenburg 5 Front Scale (extended) 13cm // A [ B, C ] D Back: Blank |
Karl-Wess![]() P125 Karl Wess |
Karl Wess - Closed simplex Made in Germany(?Aristo) Front Scale 13cm // A [ B, CI, C ] D, K || 5inch Back Slider: [ S, L, T ] |
Kent![]() S061 Kent 7153LL |
Kent 7153LL - Open simplex Made in Japan, Uchida Yoko Co., for Dutch Company Kent Front Scale L, K, A [ B, CI, C ] D, S, ST, T Back Scale 25cm [ S, LL2, LL3] 10 inch |
![]() S433 Kent 7300LL |
Kent 7300LL - Open simplex Made in Japan, Uchida Yoko Co., for Dutch Company Kent Front Scale T Cot, K, A [ B, CI, C ] D, S Cos, ST, L Back Scale [ LL1, LL2, LL3] |
Kern & Co. Aarau, Suisse![]() REF Kern Stadia Surveyor's Slide Rule |
Kern Stadia Surveyor's Slide Rule Made in Switzerland by Kern & Co. Aarau, Suisse Closed body - Steel stock and cursor Front Scale D, D [ X, Sin-Cos, TG. ] F-R Cursor: 0-100 veneer scale Archive - Tom dilatush Collection |
![]() REF Kern Stadia Surveyor's Slide Rule |
Kern Stadia Surveyor's Slide Rule Made in Switzerland by Kern & Co. Aarau, Suisse Closed body - Aluminum stock and cursor Front Scale Dist. Feet, Dist Miles [ Vertical Angles ] Diff. Elev. Part, Correction in Feet For Curvature. Archive - David Ingram Collection - www.surveyhistory.org |
Loga Daemon-Schmid, Zurich, Switzerland![]() REF Daemen-Schmid (Loga) 24 meter cylindrical |
Daemen-Schmid (Loga) 24 meter cylindrical Made in Switzerland by Daemon-Schmid 1915-1920 Paper faced aluminum drum CD (100-1000) scales divided into 60 segments for a total length of 24 meter Archive - Ed Chamberlain Collection
Galai Photo.
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![]() Ref Loga Calculator (Daemen-Schmid) 15 meter cylindrical |
Loga Calculator (Daemen-Schmid) 15 meter cylindrical Made in Switzerland by Daemon-Schmid |
![]() ISRM Loga (Daemen-Schmid) 7.5 meter cylindrical |
Loga (Daemen-Schmid) 7.5 meter cylindrical Made in Switzerland by Daemon-Schmid c1930 |
![]() REF Loga (Daemen-Schmid) 7.5 meter cylindrical |
Daemen-Schmid (Loga) 7.5 meter cylindrical Made in Switzerland by Daemon-Schmid c1930 Archive - Ed Chamberlain Collection |
![]() ISRM Loga (Daemen-Schmid) 2.5 meter cylindrical |
Daemen-Schmid (Loga) 2.5 meter cylindrical Made in Switzerland by Daemon-Schmid c1930 Archive - Herman's Slide Rule Catalogue
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![]() REF Loga Slide Rule |
Loga Slide Rule Made in Switzerland - Paper and metal backing Front Scale: Zz(K1), A [ B, R, C ] D, Zz(K2) Back Scale: A [ B, R ] C, Currency Conversions Archive Herman van Herwijnen's Slide Rule Catalogue |
![]() REF Loga Pocket Slide Rule |
Loga Pocket Slide Rule Made in Switzerland - Paper and metal backing Front Scale: K, A [ B, R, C ] D, Log Back Scale: A [ B, R ] C, Currency Conversions Archive Herman van Herwijnen's Slide Rule Catalogue |
Logarecta Déposé![]() REF Logarecta Déposé - Malta Logarithmic Scales |
Logarecta Déposé - Malta Logarithmic Scales Made in Belgium Front Scale: BackScale: Trig scales Archive - Herman van Herwijnen's SR Catalogue |
Logarex![]() ISRM Logarex 27103 Rietz (early) |
Logarex 27103 Rietz (early) Made in Czechoslovakia - Bohemia Works Front Scale K, A [ B, CI, C ] D, log Back Scale 4in, Ωmm2/m [ S, T] Constants, 10cm Cursor: 4 hairlines: q, kW, d, PS Donated by David Hecht, Alexandria, VA |
![]() P183 Logarex 27103 Rietz |
Logarex 27103 Rietz Made in Czechoslovakia - Bohemia Works Front Scale K, A [ B, CI, C ] D, L Back Scale 4in, Ωmm2/m [ S, T] Constants, 10cm Cursor: 4 hairlines: q, kW, d, PS |
![]() P171 Logarex 27204-II Rietz |
Logarex 27204-II Rietz Made in Czechoslovakia - Bohemia Works - Date 7-65 Front Scale K, A [ B, CI, C ] D, L Back Scale 12.5cm [ S, S-T, T ] 5in, Equivalents Cursor: 3 hairlines |
![]() P039 Logarex 27205 Exponent |
Logarex 27205 Exponent - Duplex Made in Czechoslovakia - Bohemia Works Toisen DOR Front Scale (extended scales) L, P, K, A [ B, CI, C ] D, tg, sin, s-t Back Scale LL1, LL2, LL3, DF [ CF, CIF, CI, C] D, LL00, LL01, LL02 Cursor: 3 hairlines: PS, KW, q, d |
![]() P115 Logarex 27302 |
Logarex 27302 Made in Czechoslovakia - Bohemia Works Front Scale 15cm, P, K, A [ B, L, CI, C ] D, S, T Back Scale 40mm(1:25) [ LL1, LL2, LL3 ] Table of Constants Cursor: 4 hairlines |
![]() ISRM Logarex 27401-X Rietz |
Logarex 27401-X Rietz Made in Czechoslovakia - Bohemia Works Front Scale (extended scales) K, A [ B, CI, C ] D, L Back Scale Equivalents [ S, ST, T] Equivalents Multiple hairline cursor: q, PS, KW, d Donated by David Hecht, Alexandria, VA |
![]() S569 Logarex 27403-X Darmstadt |
Logarex 27403-X Darmstadt Made in Czechoslovakia - Bohemia Works Front Scale (extended scales) L, P, K, A [ B, CI, C ] D, Sin, Tg, S-T Back Scale Equivalents [ LL1, LL2, LL3 ] Equivalents Multiple hairline cursor: q, PS, KW, d Original Location: Russia |
![]() S339 Logarex 27403-II Darmstadt |
Logarex 27403-II Darmstadt Made in Czechoslovakia - Bohemia Works Front Scale (extended scales) 25cm, L, P, K, A [ B, CI, C ] D, Sin, Tg, S-T || 1:25 7m Back Scale [ LL1, LL2, LL3 ] Cursor: 4 hairlines: q, kw, d, PS Has Previous Owner's Monogram on back |
![]() REF Logarex 27602-II Exponent |
Logarex 27602-II Exponent - Open Duplex Made in Czechoslovakia - Bohemia Works - Toisen DOR Front Scale (extended scales) L, P, K, A [ B, CI, C ] D, S, T, ST Back Scale LL1, LL2, LL3, DF [ CF, CIF, CI, C ] D, LL00, LL01, LL02 Cursor: 3 hairlines: PS, KW, q, d Archive - Not in Collection |
Meissner![]() REF Meissner KG Multi Pocket |
Meissner KG Multi Pocket (1974) Made in DDR/Germany - Same factory as Veb Mantissa Front Scale 13cm // ST, A, DF [ CF, CIF, CI, C ] D, P, S, T Back Slider (unverified): [ LL1, LL2, LL3, L ] Cursor: multiple hairlines Archive - Gerhard Wenzel collection (Netherlands) |
![]() REF Meissner KG Mono Rietz 731-541 |
Meissner KG Mono Rietz 731-541 Made in DDR/Germany - Same factory as Veb Mantissa Front Scale L, K, A[ B, CI, C ] D, S, T, ST Back Slider (unverified): [ LL1, LL2, LL3, L ] Archive - Courtesy of www.oldjurnal.narod.ru |
Neolt-Bergamo![]() REF Neolt-Bergamo Rietz 25 |
Neolt-Bergamo Rietz 25 Made in Italy Front Scale 27cm // K, A[ B, CI, C ] D, L Back Slider: [ S, S&T, T ] Cursor: multiple hairlines Archive Herman van Herwijnen's Slide Rule Catalogue |
![]() REF Neolt TS 10 |
Neolt TS 10 Made in Italy Front Scale 10cm // A[ B, C ] D Archive Herman van Herwijnen's Slide Rule Catalogue |
Norden![]() P060 Norden-SKF |
Norden-SKF Made in Sweden Front Scale 14cm // K, A [ B, CI, C ] D, L \\ sin cos Back Adv: SKF Back Scale [ Log, tg ctg, P ] |
Reiss![]() P002 Reiss Pocket Simplex |
Reiss Simplex Made in Germany - brushed aluminum Front Scale 13 CM // A [ B, C ] D Back Scale [ Sin, Log, Tg ] |
![]() Reiss 3201 Rietz-Spezial |
Reiss 3201 Rietz-Spezial Made in Germany - brushed aluminum Front Scale L, DF [ CF, CI, C ] D, DI Back Scale (extended) ST, T [ K, B, C ] S, P |
REF Reiss 3209 Pocket Simplex |
Reiss 3209 Simplex (1972) Made in Germany - brushed aluminum Front Scale (extended) 13 CM // K, A [ B, C ] D, L Back Scale (not verified):[ Sin, S&T, Tg ] Archive - Gerhard Wenzel collection |
![]() REF Reiss 3214 Darmstadt-Record |
Reiss 3214 Darmstadt-Record Made in Germany - Plastic Front Scale (extended scales) L, K, A [ B, CI, C ] D, LL1, LL2, LL3 Back Scale P, S, ST, DF [ CF, CIF, CI, C ] D, T1, T2, DI Cursor: 3 hairlines Original owner: Sckerr Peter Schwerin Photo contributed by Marion Moon |
![]() S198 Reiss 3236 Darmstadt |
Reiss 3236 Darmstadt - Duplex Made in Germany - Plastic Front Scale (extended scales) K, A [ B, CI, C ] D, L Back Scale P, S [ LL1, LL2, ll3 ] T1, T2 Cursor: 3 hairlines |
![]() ISRM Reiss Rietz |
Reiss Rietz Made in Germany - Plastic Front Scale 13cm // K, A [ B, CI, C ] D, L Back Scale [ S, T] Cursor: 3 hairlines Donated by David Hecht, Alexandria, VA |
![]() ISRM Reiss Darmstadt DDR |
Reiss Darmstadt DDR - Duplex Made in East Germany - Plastic Front Scale K, A DF [ CF, CIF, CI, C ] D, P, S, T Back Scale [ LL1, LL2, LL3, L] Cursor: 4 hairlines Donated by David Hecht, Alexandria, VA |
![]() Reiss Darmstadt DDR |
Reiss Darmstadt DDR Made in East Germany - Brushed Aluminum Front Scale K, A [ B, CI, C ] D, L Back Scale Cos, Sin/Tg [ LL1, LL2, ll3 ] sin, tg Cursor: 4 hairlines |
![]() S038 Reiss Rietz |
Reiss Rietz Made in East Germany - Brushed Aluminum Front Scale K, A [ B, CI, C ] D, L Back Slider [ Sin, Arc, Tan ] Cursor: 4 hairlines - PS, KW |
Rista![]() S259 Rista Rietz 1 |
Rista Rietz 1 Made in Germany - Plastic Front Scale K, A [ B, CI, C ] D, L Back Slider [ S, S&T, T ] Cursor: 4 hairlines |
Seehase, Dr. Ing.![]() P015 Dr. Ing. Seehase Pocket |
Dr. Ing. Seehase Pocket - Advertising - c1950 Made in Germany Front Scale A [ B, C ] D Back: Hardwick Hindle Inc. Resistors, USA |
![]() REF Dr. Ing. Seehase Pocket |
Dr. Ing. Seehase Pocket - Advertising - c1950 Made in Germany Front Scale A [ B, C ] D Back Scale: 5inch [] 13cm Back: Automotive Products Company, London. Archive - Herman's Slide Rule Catalogue |
![]() REF Dr. Ing. Seehase - Elektro Praktikus |
Dr. Ing. Seehase - Elektro Praktikus - c1950 Made in Germany - Alternating Current (power) Calculator Front Scale m [ A, V ][ qmm ] Cos (phase) Back Scale: qm [ Lx, Lp ][ Watt ] n (eta) Note: two slides Archive - Herman's Slide Rule Catalogue |
![]() REF Dr. Ing. Seehase - Träger-rechenstab |
Dr. Ing. Seehase - Träger-rechenstab - c1950 Made in Germany - Structural Calculator Front Scale cm [ m, cm ] Kg/m2 Back Slide: [ m, (nomograph), cm ] Back: Reference Tables, Nomographs Archive - Herman's Slide Rule Catalogue |
![]() REF Dr. Ing. Seehase - Sonderrechenstab SR 704 |
Dr. Ing. Seehase - Sonderrechenstab SR 704 - c1950 Made in Germany - Spring Design Calculator Front Scale Wire dia [ Radius of coil, Kg/cm2 ] P gramm (force) Archive - Herman's Slide Rule Catalogue |
![]() REF Dr. Ing. Seehase - Sonderrechenstab SR 705 |
Dr. Ing. Seehase - Sonderrechenstab SR 705 - c1950 Made in Germany - Spring Design Calculator Front Scale Number of coils [Wire dia, Radius of coil][stress, P (force) Kg/cm2 ] f (Travel) mm Note: Two slides Archive - Herman's Slide Rule Catalogue |
SkalaREF Skala Pocket Simplex |
Skala Simplex (1973) Made in Poland Front Scale () 15 CM // K, A [ B, CI, C ] D, L Back Scale (not verified) [ Sin, S&T, Tg ] Archive - Gerhard Wenzel collection |
![]() REF Skala Electrical |
Skala Electrical Made in Poland Front Scale () Efficiency, Volt, L, P, K, A [ B, CI, C ] D, LL3, LL2, sin cos, tg ctg, S-T Back Scale (unknown) Archive - Prof. Dr. Jörn Luetjens collection |

![]() GFT Staedtler Mars 54401 Darmstadt |
Staedtler Mars 54401 Darmstadt - 1961 Made in Germany Front Scale 10.5 // L, K, A [ B, CI, C ] D, P, S Cos, T Cot Back Scale Equivalents (english) [ LL1, LL2, LL3] Donated by Russell Fox, Anchorgae, Alaska. Used by his father who purchased it in Germany 1961-1964. He worked as an Electrical Engineer with BPA in Portland, Oregon. |
![]() S093 Staedtler Mars 544LL |
Staedtler Mars 544LL - Open Simplex Made in Germany Front Scale L, K, A [ B, CI, C ] D, S, ST, T Back Slider 25cm [ S, LL1, LL2, LL3] 10 inch |
![]() REF Staedtler Mars 544-28 Log Log |
Staedtler Mars 544-28 Log Log - dc969 ( Sep 1969) Made in Germany by Nestler (same as Nestler 0292) Front Scale P, S, T1, T2, A [ B, K, CI, C ] D, R1, R2, L, ST Back Scale LL00, LL01, LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1, LL0 Multilined Cursor: kW, HP Archive - Larry Kehl collection |
![]() S548 Staedtler Mars 544-52 Log Log |
Staedtler Mars 544-52 Log Log (Jan 1969) Made in Germany - date code 169 Front Scale K, A [ B, CI, C ] D, L Back Scale 25cm, S, ST, T, LL1, LL2, LL3, 10 inch Multilined Cursor: kg/m, S, kW, HP |
![]() REF Staedtler-Noris 944-02 |
Staedtler-Noris_944-02 - Open simplex Made in Japan Front Scale L, K, A [ B, CI, C ] D, S, ST, T Back Scale 25cm [S, LL1, Ll2, Ll3 ] 10in Archive - Not in Collection |
![]() S131 Staedtler-Noris 944-03 |
Staedtler-Noris_944-03 - Open simplex Made in Japan Front Scale T1, T2, K, A [ B, CI, C ] D, S, ST, L Back blank |
![]() ISRM Staedtler Mars 944-82 Log Log |
Staedtler Mars 944-82 Log Log Made in Japan Front Scale T1 (Cot1), T2 (Cot2), DF [ CF, CIF, S' (Cos), C ] D, (P), S (Cos), ST (ST) Back Scale LL0, L, K, A [ B, BI, CI, C ] D, LL3, LL2, LL1 Multilined Cursor: kW, HP Donated by David Hecht, Alexandria, VA |
![]() P178 Staedtler-Noris 945-03 |
Staedtler-Noris_944-03 - Closed Made in Japan Front Scale 5in // K, A [ B, CI, C ] D, L Back scale: [ S, ST, T ] |
Standardgraph
![]() REF - Standardgraph No. 910 Disco-Rietz |
Standardgraph No. 910 Disco-Rietz Made in West Germany c1960 - 12.8cm diameter Front Scale - L, CI, C ( D, Sin Cos, Tg Ctg, R) Archive - Scan donated by John Krijnen, Netherlands ![]() |
Tavernier - Gravet
![]() REF Tavernier-Gravet |
Tavernier-Gravet - c1900 Made in France- Rue Mayet 19, Paris Front Scale 25cm // A, DF [ CF, CI, C ] D \\ 25cm Back Scale (Slide): [S, L, T ] Cursor: Brass Chisel Point Archive - Rod Lovett Collection |
![]() REF Tavernier-Gravet Chisel Cursor Mannheim |
Tavernier-Gravet Chisel Cursor Mannheim- c1900 Made in France - Rue Mayet 19, Paris Front Scale 25cm // A [ B, C ] D Back Scale (Slide): [S, L, T ] Back: Equivalents (French) Archive - Tom Dilatush Collection
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![]() REF Tavernier-Gravet Beghin |
Tavernier-Gravet Beghin - c1920 Made in France - Rue Mayet 19, Paris Front Scale 25cm // A, DF [ CF, CI, C ] D, K, L Back Scale (Slide): [S, T, B ] Cursor: 3 hairlines Archive - Giovanni Breda Collection |
![]() REF Tavernier-Gravet Mannheim |
Tavernier-Gravet Mannheim - dc8-28 (Aug 1928) Made in France - Rue Mayet 19, Paris Front Scale 25cm // A [ B, C ] D Back Scale (Slide): [S, L, T (inverted) ] Back: Equivalents (French) Archive - Tom Dilatush Collection
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![]() REF Tavernier-Gravet Plastic |
Tavernier-Gravet Plastic - c1950 Made in Paris, France Front Scale (extended) 25cm // A [ B, CI, C ] D Back Scale (Slide): [S, S&T, T ] Archive - Tom Dilatush Collection
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![]() REF Tavernier-Gravet Plastic |
Tavernier-Gravet Plastic - c1950 Made in Paris, France Front Scale (extended) 25cm // A [ B, CI, C ] D Back Scale (Slide): [S, S&T, T ] Archive - Rod Lovett Collection |
![]() REF Tavernier-Gravet Beghin |
Tavernier-Gravet Beghin - dc 7-23(july 1923) Made in France - Rue Mayet 19, Paris Front Scale 35cm // A, DF [ CF, CI, C ] D, K, L Back Scale (Slide): [S, T, B ] Cursor: 3 hairlines Archive - Tom Dilatush Collection
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Tecnostyl
![]() ISRM Tecnostyl 40/R Rietz (early) |
Tecnostyl 40/R Rietz (early) Made in Italy Front Scale 27cm // K, A [ B, CI, C ] D, L Back Scale (Slide): [S, S&T, T ] Cursor: 3 hairlines Donated by David Hecht, Alexandra, VA |
![]() REF Tecnostyl 40/R Rietz (clear plastic) |
Tecnostyl 40/R Rietz (clear plastic) Made in Italy Front Scale 27cm // K, A [ B, CI, C ] D, L Back Scale (Slide): [S, ST, T ] Cursor: 3 hairlines Archive - Herman van Herwijnen's SR Catalogue |
![]() REF Tecnostyl 41/C |
Tecnostyl 41/C Made in Italy Front Scale 14cm // A [ B, %, h, st, C ] D Back Scale (Slide): [S, ST, T ] Cursor: 3 hairlines Archive - Herman van Herwijnen's SR Catalogue |
![]() REF Tecnostyl 41/C4 - Log Electrical tech |
Tecnostyl 41/C4 - Log Electrical tech Made in Italy Front Scale 14cm // A [ B, %, h, st,%, st, h, st, C ] D Back Scale (Slide): [ B, %, h, st,%, st, h, st, C ] Back: Wire gage table Cursor: 3 hairlines Archive - Herman van Herwijnen's SR Catalogue |
![]() REF Tecnostyl 41/D |
Tecnostyl 41/D Made in Italy Front Scale 14cm // P, K, A [ B, CI, C ] D, tg, sen Back Scale (Slide): [LL1, LL2, LL3 ] 5.5 in Cursor: 3 hairlines Archive - Herman van Herwijnen's SR Catalogue |
![]() REF Tecnostyl 41/E Electro |
Tecnostyl 41/E Electro Made in Italy Front Scale 14cm // cosa, A(KW) [ B (PS), CI, C ] D, cosa Back Scale (Slide): [S, lg, T ] Cursor: 3 hairlines Archive - Herman van Herwijnen's Slide Rule Catalogue |
![]() REF Tecnostyl 41/R |
Tecnostyl 41/R Made in Italy Front Scale 14cm // K, A [ B, CI, C ] D, L Back Scale (Slide): [ S, S&T, T ] Cursor: 3 hairlines Archive - Herman van Herwijnen's SR Catalogue |
![]() REF Tecnostyl ST41 |
Tecnostyl ST41 Made in Italy Front Scale 14cm // K, A [ B, CI, C ] D, L Back Scale (Slide): [ S, S&T, T ] Archive - Herman van Herwijnen's SR Catalogue |
![]() REF Tecnostyl Calcolator Gegolo da Tavolo |
Tecnostyl Calcolator Gegolo da Tavolo Made in Italy - 160mm diameter Front Scale: A ( B ) Archive - Herman van Herwijnen's SR Catalogue |
![]() REF Tecnostyl Calcolator |
Tecnostyl Calcolator Made in Italy - 160mm diameter Front Scale: A ( B ) Archive - Herman van Herwijnen's SR Catalogue |
![]() REF Tecnostyl Regolo Per Trigonometria |
Tecnostyl Regolo Per Trigonometria Made in Italy Front Scale Slide Chart for claculating right triangles Back Scale: 12cm Archive - Herman van Herwijnen's SR Catalogue |
UNIS France
![]() REF UNIS France Electro |
UNIS France Electro Made in France Front Scale 13cm // KW, A [ B, C ] D, Well: DYN MOT Archive - Oliver Cassou Collection, France |
![]() REF UNIS France Marc No 5 Electricien |
UNIS France No 5 Electricien Made in France Front Scale 13cm // KW, A [ B, C ] D, Well: DYN MOT Archive - Herman van Herwijnen's SR Catalogue |
![]() REF UNIS France Marc No 6 |
UNIS France Marc No 6 Made in France Front Scale 13cm // K, A [ B, CI, C ] D, L Slide: [ S,S&T, T] Archive - Herman van Herwijnen's SR Catalogue |
![]() REF UNIS France Marc |
UNIS France Marc Made in France Front Scale 13cm // A [ B, C ] D Archive - Herman van Herwijnen's SR Catalogue |
![]() REF UNIS France Régle Marc |
UNIS France Régle Marc Made in France Front Scale 13cm // K, A [ B, CI, C ] D, L Slide: [ S,S&T, T] Archive - Herman van Herwijnen's SR Catalogue |
UTO![]() ISRM UTO No. 1 Studium |
UTO No. 1 Studium Made in Denmark Front Scale A, DF [ CF, CIF, CI, C ] D, K Back: Blank Donated by David Hecht, Alexandria, VA |
![]() ISRM UTO 503 Studium |
UTO 503 Studium Made in Denmark Front Scale 27cm // L, K, A [ B, CI, C ] D, ST, T, S Back: Blank Font color=maroon>Donated by David Hecht, Alexandria, VA |
![]() ISRM UTO 561 Studium |
UTO 561 Studium Made in Denmark Front Scale 27cm // L, A, DF [ CF, CI, C ] D, ST ST, T Cot, S Cos Back: Blank Cursor: 3 Hairlines Font color=maroon>Donated by David Hecht, Alexandria, VA |
![]() P133 UTO 601 - Barber-Colman |
UTO 601 - Barber-Colman Made in Denmark Front Scale 5inch // K, A [ B, CI, C ] D, L Back Slider [ S, S&T, T ] Back Adv: Barber-Colman, Rockford,, Illinois |
![]() P059 UTO 601 - Hoffman - Cyanamid |
UTO 601 - Hoffman - Cyanamid Made in Denmark, Distributed by Hoffman, USA Front Scale 5inch // K, A [ B, CI, C ] D, L Back Slider [ S, S&T, T ] Back Adv: Cyanamid [Phospahtes] |
![]() P018 UTO 601 - Hoffman - Lennox |
UTO 601 - Hoffman - Lennox Made in Denmark, Distributed by Hoffman, USA Front Scale 5inch // K, A [ B, CI, C ] D, L Back Slider [ S, S&T, T ] Back Adv: Lennox Industries Inc. |
![]() P132 UTO 601 - Hoffman - Morris |
UTO 601 - Hoffman - Morris Made in Denmark, Distributed by Hoffman, USA Front Scale 5inch // K, A [ B, CI, C ] D, L Back Slider [ S, S&T, T ] Back Adv: Morris Pumps, Baldwinsville, NY Original Owner: WKM |
![]() S541 UTO 930U Poly-e |
UTO 930U Poly-e Made in Denmark Front Scale L, K, A [ B, T Cot, ST, S Cos ] D, DI, P Back Scale LL01, LL02, LL03, DF [ CF, CIF, CI, C ] D LL3, Ll2, LL1 Original Owner: Robert Millar/Canada |
![]() REF UTO 930 Studium - Charvoz |
UTO 930 Studium Made in Denmark Front Scale LL01, LL02, LL03, A [ B, L, K, C ] D, LL3, LL2, LL1 Back Scale ST, T, T2 DF [ CF, CIF, CI, C ] D, DI, P, S Archive - Rod Lovett collection |
![]() ISRM UTO 930 Studium |
UTO 930 Studium Made in Denmark Front Scale LL01, LL02, LL03, A [ B, L, K, C ] D, LL3, LL2, LL1 Back Scale ST, T, T2 DF [ CF, CIF, CI, C ] D, DI, P, S Cursor: 3 Hairlines Note: Very poor red ink, be careful in cleaning this model Donated by David Hecht, Alexandria, VA |
![]() REF UTO 932 - Charvoz |
UTO 932 - Charvoz Made in Denmark for Charvoz Front Scale LL00, K, A [ B, T Cot, ST, S Cos, C ] D, DI, LL0 Back Scale LL01, LL02, LL03, DF [ CF, CIF, L, CI, C ] D LL3, Ll2, LL1 Archive - Rod Lovett collection |
![]() ISRM UTO F2145 |
UTO F2145 Made in Denmark Front Scale 11cm 4in // K, A [ B, CI, C ] D, L Back Scale [ S, S&T, T ] Cursor: 3 Hairlines Original Owner: C.W. Wright, Paris, Kentucky, USA Note: Very poor red ink, be careful in cleaning this model Donated by David Hecht, Alexandria, VA |
VEB Electro-Apparate-Werke (EAW) ![]() ISRM VEB Electro-Apparate-Werke (EAW) Pocket |
Veb VEB Electro-Apparate-Werke (EAW) Pocket- c1946 Made by Berlin-Treptow, DDR Germany - wood stock with plastic laminate Front Scale 13cm // K, A[ B, CI, C ] D, L Back Scale: [ sin, sin/tg, tg ] Donated by David Hecht, Alexandria, VA |

![]() P107 Veb Mantissa Multi Pocket |
Veb Mantissa Multi Pocket - Closed simplex Made in DDR/Germany Front Scale 13cm // ST, A, DF [ CF, CIF, CI, C ] D, P, S, T Back Slider: [ LL1, LL2, LL3, L ] Cursor: 3 hairlines |
![]() S059 Veb Mantissa Mono Rietz 1731-541 |
Veb Mantissa Mono Rietz 1731-541 - Simplex Made in DDR/Germany Front Scale L, K, A [ B, CI, C ] D, S, T, ST Back Slider: Blank Cursor: 3 hairlines |
![]() S200 Veb Mantissa 1731-511 Rietz |
Veb Mantissa 1731-511 Rietz - Duplex Made in DDR/Germany Front Scale K, A [ B, CI, C ] D, L Back Scale: [ S, ST, T ] Cursor: 3 hairlines |
![]() S163 Veb Mantissa Darmstadt II 1731 523/4 |
Veb Mantissa Darmstadt II 1731-523/4 Made in DDR/Germany Front Scale K, A [ B, CI, C ] D, L Back Scale P, ST [ LL1, LL2, LL3] D, T, S |
![]() REF Veb Mantissa Record 1731-421 |
Veb Mantissa Record 1731-421 Made in DDR/Germany Front Scale L, K, A [ B, CI, C ] D, LL1, LL2, LL3 Back Scale P, S, ST, DF [ CF, CIF, CI, C ] D, T1, T2, DI Archive - Not in Collection |
![]() ISRM Veb Mantissa Mono Rietz 1731 541 |
Veb Mantissa Mono Rietz 1731 541 Made in DDR/Germany Front Scale L, K, A [ B, CI, C ] D, S, T, ST Back: Blank |
![]() REF Veb Mantissa Trim LL 1731-433 |
REF Veb Mantissa Trim LL 1731-433 Made in DDR/Germany Front Scale P, S, K, A [ B, L, CI, C ] D, T1, T2, DI Back Scale LL01, LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1 Archive - Rod Lovett Collection |
Vittorio Martini, Antica Fabbrica ![]() REF Antica Fabbrica Vittorio Martini Elettro (Electro) 401 |
Antica Fabbrica Vittorio Martini Elettro (Electro) 401 Made in Italy Front Scale 14cm // Volt, A [ B, CI, C ] D, U \\ 5 Inch Back Scale (Slide): [ S, ST, T ] Cursor: Multiple hairlines C, -C Archive - Giovanni Breda Collection |
![]() REF Antica Fabbrica Vittorio Martini Elettro Cosfi (Electro) 402 |
Antica Fabbrica Vittorio Martini Elettro Cosfi (Electro) 416 Made in Italy Front Scale 14cm // Volt, A [ B, CI, C ] D, Cosfi \\ 5 Inch Back Scale (Slide): [ S, ST, T ] Cursor: Multiple hairlines C, PS/kW Archive - Giovanni Breda Collection |
![]() REF Antica Fabbrica Vittorio Martini Darmstadt 404 |
Antica Fabbrica Vittorio Martini Darmstadt 404 Made in Italy Front Scale 14cm // P, K, A [ B, CI, C ] D, S, T, L Back Scale (Slide): [ LL1, LL2, LL3 ] Cursor: Multiple hairlines C, PS/kW Archive - Giovanni Breda Collection |
![]() REF Antica Fabbrica Vittorio Martini Rietz 3991 |
Antica Fabbrica Vittorio Martini Rietz 3991 Made in Italy Front Scale 14cm // K, A [ B, CI, C ] D, L \\ 5 inch Back Scale (Slide): [S, ST, T ] Cursor: Multiple hairlines C, -C Archive - Giovanni Breda Collection |
![]() REF Antica Fabbrica Vittorio Martini Rietz 25 |
Antica Fabbrica Vittorio Martini Rietz 25 Made in Italy Front Scale 26cm // K, A [ B, CI, C ] D, L ||10 inch Back Scale (Slide): [S, ST, T ] Cursor: Multiple hairlines C, -C Archive - Giovanni Breda Collection |
![]() REF Antica Fabbrica Vittorio Martini Rietz 25 |
Antica Fabbrica Vittorio Martini Rietz 25 Made in Italy Front Scale 26cm // K, A [ B, CI, C ] D, L ||10 inch Back Scale (Slide): [ S, ST, T ] Cursor: Multiple hairlines C, -C Archive - Giovanni Breda Collection |
![]() REF Antica Fabbrica Vittorio Martini Darmstadt 417 |
Antica Fabbrica Vittorio Martini Darmstadt 417 Made in Italy Front Scale 26cm // K, A [ B, CI, C ] D, P, S, T || L Back Scale (Slide): [ LL1, LL2, LL3 ] Cursor: Multiple hairlines C, PS/kW Archive - Giovanni Breda Collection |
![]() REF Antica Fabbrica Vittorio Martini Elettro Cosfi (Electro) 416 |
Antica Fabbrica Vittorio Martini Elettro Cosfi (Electro) 416 Made in Italy Front Scale 26cm // Volt, A [ B, CI, C ] D, Cosfi, K, LL(A)|| L Back Scale (Slide): [ S, ST, T ] Cursor: Multiple hairlines C, PS/kW Archive - Giovanni Breda Collection |
Gebr. Wichmann (Wichmann Brothers) ![]() REF Gebr, Wichmann 431 |
Gebr. Wichmann 431 c1900 Made in Berlin, Germany by Wichmann Brothers - Paper composite with brass chisel cursor Front Scale A [ B, C ] D Back: Blank Archive - Ed Chamberlain Collection |
![]() REF Gebr. Wichmann 466 |
Gebr. Wichmann 466 c1900 Made in Berlin, Germany by Wichmann Brothers - Paper composite with brass chisel cursor Front Scale A [ B, C ] D Back: Blank Archive - Ed Chamberlain Collection |
![]() REF Gebr. Wichmann 1327-1/2 |
Gebr. Wichmann 1327-1/2 Made in Germany by Gebr. Wichmann m.b.h. (Wichmann Brothers) Front Scale A [ B, C ] D Archive - Herman van Herwijnen's SR Catalogue |
![]() REF Wichmann 4428 |
Gebr. Wichmann 4428 Made in Germany by Gebr. Wichmann m.b.h. (Wichmann Brothers) Front Scale A [ B, C ] D Back scale: 27.2cm [S, L, T ] 10.75in Archive - Scan provided by Mark D. Sutton |
Wolters-Noordhoff ![]() REF Wolters-Noordhoff Rietz 87 |
Wolters-Noordhoff Rietz 87 Made in Japan (Fuji) for Dutch Company Front Scale K, A [ B, CI, C ] D, L Back Slide 0-15cm, 15-0cm [ S, T, T1 ] Archive - Herman van Herwijnen's SR Catalogue |
![]() S062 Wolters-Noordhoff FJ102 |
Wolters-Noordhoff FJ102 - Simplex Made in Japan (Fuji) for Dutch Company Front Scale L, DF [ CF, CIF, CI, C ] D, A, K Back Slide 25cm [ S, ST, T1, T2 ] Cursor: 3 hairlines |
![]() REF Wolters-Noordhoff 112 |
Wolters-Noordhoff 112 Made in Japan by Fuji Front Scale L, DF [ CF, CIF, CI C ] D, A, K Cursor: 3 hairlines: PS, KW, C Back Scale 25cm [ S Cos, ST , T1 Cot1, T2 Cot2 ] Archive - Rod Lovette Collection |
![]() REF Wolters-Noordhoff JE650 |
Wolters-Noordhoff JE650 - Duplex Made in Germany for Dutch Company Front Scale A, DF [ CF, CIF, CI, C ] D, K Back Scale L, T1 Cot1, T2 Cot2 [ S', CI, C ] D, S Cos, ST Cursor: 3 hairlines Archive - Herman van Herwijnen's SR Catalogue |
![]() S063 Wolters-Noordhoff 1200 |
Wolters-Noordhoff 1200 - Duplex Made in DDR/Germany Front Scale T1 Cot1, T2 Cot2, A [ B, BI, CI C ] D, P, S Cos, ST Back Scale LL1, LL2, LL3, DF [ CF, CIF, CI C ] D, L, K Cursor: 3 hairlines: PS, KW, C |
Zulaica y Cia![]() REF Zulaica Stilus |
Zulaica Stilus (c1930) Made in Spain by Zulaica y Cia S.R.C., Zarauz, Guipuzcoa, Basque region Front Scale A [ B, CI, C ] D Back Equivalents and constants Archive - Herman van Herwijnen's SR Catalogue |