| Name and Model Number | Tavernier-Gravet K&E Slide Rule |
| Country of Origin | France |
| Date of Manufacture | ca. 1885 |
| Front Scales | A [ B, C ] D |
| Back Scales | Printed tables, in English |
| Scale Length | 8" (20 cm) plus 20 cm measuring scale on top beveled edge |
| Type of Rule | Slide Rule |
| Construction | Boxwood with brass chisel cursor |
| Area of Use | Generic |
| Comment | This type of slide rule appears in K&E catalogs throughout the 1880s,
noting that K&E does not list this particular size. This rule bears both names Tavernier-Gravet and Keuffel & Esser. |
| Rarity | RRR |
| Donor | Photo from a collection in USA |
| Match Number | 79 |
| 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. |