| 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 |
| 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. |