| Name and Model Number | Russian Slide Rule System Hasselblatt |
| Country of Origin | Russia |
| Date of Manufacture | 1889 |
| Front Scales | cm / °, S, T, °, A [ B, B ] D, L, D, D, K \ inch |
| Back Scales | None |
| Scale Length | 20 cm |
| Type of Rule | Slide Rule |
| Construction | Paper on several layers of cardboard |
| Area of Use | Generic |
| Comment | A Soho type cardboard slide rule without a cursor. The cloth wallet has short instructions. Literature
Leipälä Timo: The Hasselblatt Slide Rule System”, Journal of the Oughtred Society, Vol. 13, 2004, Nr. 1, p. 60-63 Leipälä Timo: Arthur Hasselblatt and his 1889 side rule, at http://www.rechenschieber.org/Hasselblatt.pdf Leipälä Timo & Shilov V.V.: Artur Gassel'blat i ego logarifmicheskaya lineika, Prilozhenie k zhurnalu Informatsionnye tekhnologii, 2012, Nr. 8, p. 14-20 |
| Rarity | RRRR |
| Donor | Collection of Timo Leipälä |
| Match Number | 398 |
| 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. |