| Name and Model Number | Faber c.1892 |
| Country of Origin | Germany |
| Date of Manufacture | c. 1892 |
| Front Scales | cm / A [B, C] D \ inch |
| Back Scales | Meter scale to 50 cm on reverse of slide; inch - cm conversion scale on back |
| Scale Length | 25 cm |
| Type of Rule | Slide Rule |
| Construction | Boxwood, cursor equipped with one hairline, two screws for adjusting the glass and on both sides two chisel points used in older all metal cursors |
| Area of Use | Generic |
| Comment | On the bottom there is Austrian retailer stamp of Gebrüder Fromme, Vienna and on the bottom wall the cyrillic initials V.Sh. of its Russian owner. According to the article Krebs Erich: Die Rechenstäbe und Rechenmaschinen einst und jetzt, p. 147-162 in Matschoss Conrad (ed.): Beiträge zur Geschichte der Technik und Industrie, Dritter Band, 1911, Faber's first glass cursors had chisel points and were introduced at the end of 1880ies. On the other hand Peter Holland writes in his Faber-Castell book that the production of Faber slide rules began 1892. Internet page www.sliderulemuseum.com page presents another Faber rule having cursor with chisel points, but there are some differences:
- cm scales are here called mètre and not meter - the bevels of the slide rule and the cursor are here fully symmetric - here the cursor does not have any spring. |
| Rarity | RR |
| Donor | Collection of Timo Leipälä |
| Match Number | 371 |
| 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. |