Full Details

Name and Model Number Russian
Glavtochmash Experimental Plant
Loglog Slide Rule
Country of Origin Soviet Union
Date of Manufacture c. 1934
Front Scales cm / LL2, A [ B, CI, C ] D, LL3 | cm
Back Scales S, L, T
Scale Length 25 cm
Type of Rule Slide Rule
Construction Celluloid on wood
Area of Use Generic
Comment The slide rule was produced by "the Experimental Weight Measure Plant" in Moscow belonging to factory group (trust) Glavtochmash. A 12.5 cm version with additional K scale also exists, and its image can be seen at Leipälä Timo: On Soviet Loglog Slide Rules, Journal of Oughtred Society, Vol. 21, Number 1, Spring, 2012, p. 23-25.
Rarity RRR
Donor Collection of Timo Leipälä
Match Number 380
(Click Picture for Details)

In conjunction with our 'donors' we assign a rarity rating to each item, based on the system devised by Herman van Herwijnen
(1929 - 2004), renowned Dutch collector, author, and creator of Herman's Archive, a collection of 5,000 slide rule images on CD.
• RR = Rare - 1 of 25 collectors has one; it may take a year to find an example in the marketplace.
• RRR = Very Rare - only a few known to collectors; may be several years before it comes up for sale.
• RRRR = Extremely Rare - a museum piece; unlikely that an example will come up for sale.