Full Details

Name and Model Number Turbocompressor. Slide Rule. Devised by Leib Stern
Country of Origin USSR
Date of Manufacture 1957
Front Scales C, D, plus many specialized scales
Back Scales Listing of constants and formulas
Scale Length 26 cm
Type of Rule Slide Rule
Construction Celluloid on wood. Plastic cursor.
Area of Use Technical
Comment For calculation of characteristics related to turbocompressors and the air flowing in them.
Invented by Leib (Leonid) Stern (1914-1999). Made by the Leningrad measuring instruments factory.
Rule was donated to my collection by the late inventorís daughter.
For more photos and info see http://www.nzeldes.com/HOC/Stern.htm
I havenít heard of another example of this slide rule.
Rarity RRRR
Donor Collection of Nathan Zeldes, Israel
Match Number 249
(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.