| 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 inventor’s daughter. For more photos and info see http://www.nzeldes.com/HOC/Stern.htm I haven’t heard of another example of this slide rule. |
| Rarity | RRRR |
| Donor | Collection of Nathan Zeldes, Israel |
| Match Number | 249 |
| Thumbnail (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. |