Full Details

Name and Model Number	Russian Artillery Slide Rule
Country of Origin	Soviet Union
Date of Manufacture	c. 1935
Front Scales	D, A [ B, S ] T
Back Scales	None
Scale Length	20 cm
Type of Rule	Slide Rule
Construction	Celluloid on wood
Area of Use	Military
Comment	Made in Leningrad by Prometei factory, see "Leipälä T.: Soviet Prometei slide rules 1931-1937, http://www.rechenschieber.org/BochumPrometeirevised2013.pdf
Rarity	RRR
Donor	Collection of Timo Leipälä
Match Number	395
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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.