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

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, UGK - Sofia, Bulgaria

Gamma

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

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 ]
REF Gamma-Budapest 2503 Darmstadt	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
REF Gamma Thermotechn. 2512 Darmstadt dc42	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 'Losztályu' 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).

REM Logar Rietz Pocket	Logar Rietz Pocket Made in Hungary - MSZ 4617-57 standard Front Scale 13cm, L, K, A [ B, CI, C ] D, L Back Scale: [ S, S&T, T ] Cursor: 3 hairlines Scan By Shin Ghain Collection
REM Logar Darmstatd	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
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
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
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
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
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
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
ISRM Logarex 27602-II Exponent	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
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 of slide rule and manual 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 of slide rule and manual 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)

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)