Eastern Europe Slide Rules
(Manufacturers. Distributors and Countries not found in their own gallery)

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This gallery is dedicated to slide rules and manufacturers located within Eastern Europe. Additional Countries and manufacturers which were part of the Soviet Bloc may be found in the USSR/Soviet gallery (Includes Ukraine, Lithuania, Latvia, Estonia, Georgia and other countries which were created after the collapse of the USSR).
Manufacturers/Brands Represented in this gallery:
Gamma - Hungary, Logar - Hungary, Logarex Czech Republic, Skala - Poland, Tehnolemn - Romania, Terta - Hungary, Triso - Slovenia
UGK - Sofia, Bulgaria

Gamma

Gamma Mũvek Works (Factory), Budapest, Hungary (1981)

P014 Gamma Pocket P014	Gamma Pocket - Closed simplex Made in Hungary Front Scale (unmarked) 13cm // K, A [ B, CI, C ] D, L Back Slider [ S, S&T, T ]
Gamma-Budapest 2503 Darmstadt REF	Gamma-Budapest 2503 Darmstadt Made in Hungary Front Scale (unmarked) 27cm, L // K, A [ B, CI, C ] D, P \|\| S, T Back Slider [ LL1, LL2, LL3 ] Back: Equivalents and Conversion factors Note: Early riveted laminated wood stock, railroad track divisions, Plastic cursor with hairline wrapped on edges. Archive - Herman van Herwijnen's Slide Rule Catalogue
Gamma Thermotechn. 2512 Darmstadt dc42 REF	Gamma Thermotechn. 2512 Darmstadt dc42 Made in Hungary Front Scale (unmarked) 27cm, L // K, A [ B, CI, C ] D, P \|\| S, T Back Slider [ LL1, LL2, LL3 ] Back: Equivalents and Conversion factors Note: Early riveted laminated wood stock, railroad track divisions, Plastic cursor with hairline wrapped on edges. Scan Donated by Giovanni Brenda Collection, Italy

KAUZ Instytut Dowodzenia

Side 1

Side 2

KAUZ Kalkulator

KAUZ Kalkulator
Made in Poland. ASG 1967
Scales: At this point it appears to ne a Nuclear Effects calculator
Google translation: Reversible slider (35 cm x 25 cm) called "CALCULATOR AND DESTRUCTION OF NUCLEAR beats" The scale of production, 1967 On a scale lists all possible objects: roads, rails, bridges, water, cars, buses, guns, tanks, planes, rockets, etc, etc and their possible locations
Archive - Photo by Jacek Szukowski collection

Logar

Note that the label MSZ4617-57 is a standard like the USSR GOST system, not a model number. It appears on both 27cm and 13cm pocket Hungarian Logar models.

Moni István in Hungary. contributes the following (edited by ISRM):
The 'I. Osztályu' found in the well of Logar slide rules means: 'First class'. 'Logar' is a brand name. Grammatically it is the first letters of 'Logarléc' which means Slide Rule. (In Hungarian it is a compound word: logar-léc, means logarithmic or algorithmic ) In Hungary, on the eastern side of the Iron Curtain we used to invent new brand names for two reasons, First, so it would sound better in the West. If a product was developed and intended to be sold to Western markets, it received a new name. Second: during Socialism, we did not have many competing factories or brands. Only one or two companies in the governments hands. The slide rules were manufactured by Gamma Mũvek Works in Hungary. The Hungarian Socialist Party had a policy of forcing a manufacturer to provide multiple names to a product, so the Hungarian people could think they were choosing from not one, but two brands. In this case, Gamma AND Logar slide rules, even though they are basically the same manufacturer. (in the USA we re-branded Hemmi and Ricoh slide rules also).

Logar Rietz Pocket ISRM 20.04.01.393	Logar Rietz 13cm Pocket Made in Hungary - MSZ 4617-57 standard Note: Railroad Track style scales Front Scale: 13cm, L, K, A [ B, CI, C ] D, L Back Scale: [ S, S&T, T ] Cursor: 3 hairlines Gift Of Philip Stanley Collection
Logar Darmstatd 25cm REF	Logar Darmstatd Made in Hungary - MSZ 4617-57 standard Front Scale: 25cm, L, K, A [ B, CI, C ] D, P \|\| S, T Back Scale: [LL1, LL2, LL3] Constants Cursor: 3 hairlines Scan By Giovanni Breda Collection, Italy

LOGAREX, Ceske Budejovice
Czechoslovakia - Bohemia Works

Founded before WWII, the Logarex company was a factory for fabricating drawing instruments. From 1948 to 1950 Logarex belonged to L&C Hardtmuth, which made the Koh-I-Noor brand pencils. After becoming a state run business as part of the Soviet empire, LOGAREX made slide rules mainly for the Eastern Block.

Logarex 27103 Rietz (early) ISRM 09.01.12.111	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
Logarex 27103 Rietz ISRM 22.03.01.105	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 Gift of Philip E. Stanley, Worcester, Mass.
Logarex 27203 Darmstadt Pocket ISRM 12.03.02.15	Logarex 27203 Darmstadt Pocket Made in Czechoslovakia - Bohemia Works Front Scale: 12.5cm // P, K, A [ B, L, CI, C ] D, Sin, Tan Back Scale: 1:25 scale 3m [ LL1, LL2, LL3] Constants, 10cm Cursor: 4 hairlines: Donated by Richard Davis, Las Vegas Nevada
Logarex 27204-II Rietz P171	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
Logarex 27205 Exponent P039	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
Logarex 27302 P115	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
Logarex 4542-27201 Elektro pocket slide rule REF	Logarex 4542-27201 Elektro pocket slide rule Made in Czechoslovakia - Bohemia Works Front Scale: P, A [ B CI, C ] D, X⁴ Back Scale: 12.5cm [S, L, T ] Table of Constants, 30mm(1:25) Cursor: Missing Archive - Jaroslav Kramer Collection
Logarex 27401-X Rietz ISRM 09.01.12.112	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
Logarex 27402-X Elektro REF	Logarex 27402-X Elektro Made in Czechoslovakia - Bohemia Works Front Scale (extended scales) L, K, A [ B, CI, C ] D, LL1, LL2, LL3 Back Scale: Equivalents [ S, ST, T] Equivalents/Factors Multiple hairline cursor: q, PS, Hp, KW, d Scan by Steve Seale Collection, nashville, Tennessee.
Logarex 27403-X Darmstadt ISRM 12.03.02.05	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 Donated by Richard Davis, Las Vegas, Nevada
Logarex 27403-II Darmstadt S339	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
Logarex 27602 ISRM 12.04.25.01	Logarex 27602 Made in Czechoslovakia - Bohemia Works - Toisen DOR Front Scale (extended scales) ST, P, K, A [ B, log, C ] D, Tg, Sin Back Scale: LL1, LL2, LL3, DF [ CF, CI, C ] D, LL00, LL01, LL02 Cursor: 3 hairlines Donated By Zdenka Novosad, Louisville, Colorado Zdenka was given this slide rule by her boyfriend in her first year at university, a very expensive item at the time. She graduated with a masters degree in Czechoslovakia. She received a PhD. from the University of Pennsylvania (1975) and later became a Petroleum Engineer for Shell Canada Limited and was a member of the Society of Petroleum Engineers. One of her many papers, published in 1996 by the journal 'SPE Reservoir Engineering', was Composition and Phase Changes in Testing and Producing Retrograde Gas Wells and she wrote Spectroscopic and Magnetic Resonance Studies of Aromatic Molecules published by the Graduate School of Arts and Sciences, University of Pennsylvania, 1975. Currently retired and an active tennis player.
Logarex 27602-II Exponent ISRM 17.05.02.48	Logarex 27602-II Exponent 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 Gift Of Mike Weaver, UK
Logarex 27602-II Exponent ISRM 13.00.00.98	Logarex 27602-II Exponent Made in Czechoslovakia - Bohemia Works - Toisen DOR Note: Clear _Molded Cursor. 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
Logarex 27607-I Studio ISRM 12.03.02.11	Logarex 27607-I Studio - Duplex Made in Czechoslovakia - TECHNIK, Bohemia Works Toisen DOR Front Scale: ST, T1, T2, DF [ CF, CIF, CI, C] D, P, S Cos Back Scale (extended): LL01, LL02, LL03 A [ B, L, K, C ] D, LL3, LL2, LL1 Cursor: 3 hairlines: PS, KW, q, d Donated by Richard Davis, Las Vegas, Nevada
Logarex 27730 Gas Slide Rule Plynárenské Pravítko, Ceské Plynárenské Podniky REF	Logarex 27730 Marked: Plynárenské Pravitko (Gas Ruler), Ceské Plynárenské Podniky (Czech Gas Enterprises) Made in Czechoslovakia - Bohemia Works Front Scale: 25cm // Pz-Pk, x², P²z-P²k [ L, D ] Q, x Back: Instructions in Czech. Multiple hairline cursor: S_sv=0.40, S_zp=0.65, S_sv=0.50 Scan by Steve Seale Collection, Nashville, Tennessee.

SKALA (SCALE) - Warszawa, Poland

Cooperative SCALE - a company known mainly from the production of accessories and drafting aids. including slide rules, The head office is located in Warsaw, in the district of Wola on Odolanch , ul. Gizów 6th SKALA (or SCALE) was created after World War II in 1950, based on the "St. Szymanski and K. Gypsy" company established in 1929. The company, which dealt with the supply of equipment initially relying on imports, slowly becoming a producer. SKALA is now the only Polish manufacturer of compasses, technical and precise, and also produces small and medium-sized plastic drawing instruments, especially for technical school workshops. The president of the cooperative is Andrew Rowinski, and the company is currently engaged in manufacturing, marketing and services, and has a network of company-owned stores. See www.sp-skala.com.

Several of the SKALA slide rules have "ZAKt.im.dymitrowa Warszawa" or similar markings in the well. "Zaklady im. Dymitrowa" was a name of the manufacturing plant in Warsaw after the WWII. The factory was founded in the early 30s by an electrical engineer and manufactured electrical high-voltage control equipment. The communists nationalized the plant, expelled the owner (a capitalist, the "enemy of the people") and re-named the factory after a Bulgarian communist, George Dimitrov. The name had nothing in common with any manufacturing standards, communists named most of the factories after their heroes.

REF SKALA Pocket Simplex (old Version)	SKALA Simplex Made in Poland Front Scale (extended) K, A [ B, CI, C ] D, L Back Scale (not verified) [ Sin, S&T, Tg ] Archive - Photo by Jacek Szukowski collection (Poland)
REF SKALA Rietz Pocket Simplex	SKALA Rietz Pocket Simplex Made in Poland - c1973 Front Scale (extended) K, A [ B, CI, C ] D, L Back Scale (not verified) [ Sin, S&T, Tg ] Archive - Scan By Giovanni Breda Collection (Italy)
REF SKALA SKLM Pocket	SKALA SKLM Pocket Made in Poland Front Scale (extended) L, P, K, A [ B, CI, C ] D, Sin. Tan, S-T , Back Side: blank Archive - Photo by Jacek Szukowski collection (Poland)
REF SKALA Paper Scales School Version	SKALA Paper Scales School Version Made in Poland Front Scale: A [ B, C ] D Back: Resistance of metals, factors, equations Archive - Photo by Jacek Szukowski collection (Poland)
REF Skala 26462 Simplex	Skala 26462 Simplex Made in Poland Note: Railroad track type divisions Front Scale (Extended) 27 CM // K, A [ B, CI, C ] D, L \|\| 1:25 Back Scale [ Sin, S&T, Tg ] Archive - Scan By Giovanni Breda Collection.
REF Skala SLPG 62026 Simplex	Skala SLPG 62026 Simplex (1973) Made in Poland Note: Railroad track type divisions Front Scale (Extended) 27 CM // K, A [ B, CI, C ] D, L \|\| 1:25 Back Scale [ Sin, S&T, Tg ] Scan donated by John Kijnen, the Netherlands.
REF Skala SLPP 170083	Skala SLPP 170083 Made in Poland Front Scale (Extended) L, P, K, A [ B, CI, C ] D, Sin, Tg, S&t Back: Blank Scan donated by John Kijnen, the Netherlands.
REF Skala SLE Electrical	Skala SLE 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 - Scan By Giovanni Breda Collection (Italy)

PRZYRZAD DO WSTRZELIWANIA

PRZYRZAD DO WSTRZELIWANIA Military Artillery Circular

Fold 1

Cover

PRZYRZAD DO WSTRZELIWANIA Military Artillery Circular
Made in Poland. Wz.1944
Scales: 2 circular slide rules for artillery
See also SKALA version
Archive - Photo by Jacek Szukowski collection (Poland)

REF Logarytmiczna Military Artillery Circular

Cover

PRZYRZAD DO STRZELIWANIA Logarytmiczna Military Artillery Circular
Made in Poland Wz.1987
Two disks on a three fold assembly

Archive - Photo by Jacek Szukowski collection (Poland)

Tehnolemn - Romania
Riglas de Calcul

S494 Tehnolemn STAS-6188-60 LEI-165 R.P.R.	Tehnolemn STAS-6188-60 LEI-165 R.P.R. Made in Romania People's Republic Front Scale (extended scales) 27cm // K, A [ B, CI, C ] D, L Back Scale: [S, ST, Tg ] Cursor: Multiple Hairlines, Kw, CP, d, d, q Back: Equivalent, Material Properties
REF Tehnolemn STAS-6188-60 LEI-43.50 R.P.R.	Tehnolemn STAS-6188-60 LEI-43.50 R.P.R. Made in Romania People's Republic Front Scale (extended scales) K, A [ B, CI, C ] D, L Back Scale: [Sin, S&T, Tg ] Cursor: Multiple Hairlines, Kw, CP, d, d, q Archive - Jim Cerny and Bob Adams Collection
REF Tehnolemn 1473-66 LEI-215 R.P.R.	Tehnolemn STAS-6188-60 LEI-215 R.P.R. Made in Romania People's Republic Front Scale (extended scales) 27cm // P, K, A [ B, BF, CI, C ] D, LL3, LL2, Ll1 \|\| L, 1:1.25 Well: Dynam, Motor, Volt Back Scale: [S, ST, T ] Cursor: Multiple Hairlines, Kw, CP, d, d, q Archive - Jim Cerny and Bob Adams Collection
REF Tehnolen 1473-66 LEI-200 R.P.R.	Tehnolemn 1473-66 LEI-200 R.P.R. Made in Romania People's Republic Front Scale (extended scales) 27cm // LL2, K, A [ B, BF, CI, C ] D, P, LL3 \|\| L Well: Dynam, Motor, Volt Back Scale: [S, ST, T ] Cursor: Multiple Hairlines, Kw, CP, d, d, q Archive - Jim Cerny and Bob Adams Collection

Terta
Hungary

REF Terta_Logartarcsa

Terta_Logartarcsa
Made in Hungary

Archive - Budai János Collection (Hungary)

Triso - Slovenj Gradec - Slovenia

In 1904, the entrepreneur from Slovenj Gradec JA Siegel started producing wooden scales. In 1927 the company was taken over by Mr. Ivan Mikolic and as a successful entrepreneur greatly expanded the range of wooden products with toys and school supplies.In 1945 after World War II, the Scale Factory expanded its program to include metal and plastic scales. In 1972, Tovarna meril was transformed into a working organization called "Slovenijales Tovarna meril Slovenj Gradec", consisting of four production organizational units (Plastika, Kovine, Les and Kopa) and a joint service unit. In 1979, the organizational units became independent companies (TOZDi), and the production program of school supplies and thermoplastic injection molding was completely taken over by TOZD Tovarna meril Plastika.In 1996, Triso was transformed into a joint stock company. With the gradual loss of Yugoslav markets, the consequences of outdated technology and the lack of a vision and strategies for future operations, Triso dd ceased to operate as a company in 2007. The production of measuring instruments and drawing accessories is moving and hosting under various companies with the desire to preserve the brand, until the establishment of the company Triso doo in 2012.In February 2012, at the initiative of the employees of the Triso brand, a new company, Triso doo, was established.http://www.triso.si/podjetje.html Slide rule calculator in slovenian is "diapozitiv pravilo kalkulator".

Triso 6501 Rietz Pocket ISRM 20.04.01.370	Triso 6501 Rietz Pocket Made in Slovenia/Yugoslavia Front Scale: 13cm // C(K), A [ B, CI, C ] D, L Back Scale: [ S, S&T, T ] Gift of Phillip Stanely of Worchester, MA.
Triso 6502 Rietz ISRM 21.11.28.01.X	Triso 6502 Rietz Made by TRISO / TOVARNA-MERIL / Slovenijales , 2004 Front Scale(Extended): 27cm // K, A [ B, CI, C ] D, L Back Scale (Gray slide): [ S, S&T, T ] Back: Shows the Triso company history tim,eline from 1904-2004. Gift of Prof. Dr.-Ing. Christian-M. Hamann of Berlin, Germany. Chris made a special effort on a trip back to Berlin to retrieve this slide rule for inclusion into the ISRM archives.
Need specimen of Triso 6503 Darmstadt	Triso 6503 Darmstadt Made by TRISO / TOVARNA-MERIL / Slovenijales , 2004 Front Scale: Unknown Back Scale: Unknown
Triso 6504 Darmstadt ISRM 21.05.27.03.X	Triso 6504 Darmstadt Made in Slovenia Front Scale: 13cm // K, A [ B, BI, CI, C ] D, P, S CS, T CT Back Scale(Green slide): [ L, LL1, LL2, LL3 ] Acquired out of Serbia
Need specimen of Triso 6505 Darmstadt	Triso 6505 Darmstadt Made by TRISO / TOVARNA-MERIL / Slovenijales , 2004 Front Scale: Unknown Back Scale: Unknown
Triso 6561 Darmstadt Pocket ISRM 21.05.27.03	Triso 6561 Darmstadt Pocket Made in Slovenia Front Scale: 13cm // K, A [ B, BI, CI, C ] D, P, S CS, T CT Back Scale: [ L, LL1, LL2, LL3 ] Acquired out of Serbia
Need specimen of Triso 6562 Darmstadt	Triso 6562 Darmstadt Pocket Made in Slovenia Front Scale: 13cm // K, A [ B, BI, CI, C ] D, P, S CS, T CT Back Scale: [ L, LL1, LL2, LL3 ]

UGK
Sofia, Bulgaria

UGK RPGP Pocket Duplex
ISRM 18.07.11.11

UGK RGPG Pocket Open Simplex
Made in Made in Bulgaria from RPGP - Sofia, Bulgaria
Front Scale: K, A [ B, CI, C ] D, L
Back Scale: [ S, ST, Tg]
Note: The UGK RPGP is the name of the factory which produced the above instrument. RPGP stands "Research company for geodesic instruments".
Note: Do not clean this model, the ink is right in the surface and is easily rubbed off.
Gifted by Phil Stanley of Worcster, Massachussettes

Philip Stanley retired from engineering to become a full-time dealer in and appraiser of antique scientific instruments and tools as The Analytical Engine. He has written two books on antique measuring instruments, and numerous articles on instruments and technology, and has given several talks on these subjects. Phil appeared on the Antiques Road Show on PBS, as an appraiser, in 2012, 2013, 2014.

Eastern Europe Slide Rules (Manufacturers. Distributors and Countries not found in their own gallery)