| Name and Model Number | Gravet-Lenoir Tavernier & Vinay Slide Rule |
| Country of Origin | France |
| Date of Manufacture | c. 1870-71 |
| Front Scales | A [B B ] D (Soho scale arrangement), Lower edge cm scale, well beneath slide cm scale |
| Back Scales | LL00 LL01 LL02 LL03 DF = CF CIF L CI C = D LL3 LL2 LL1 LL0 |
| Scale Length | 25-cm |
| Type of Rule | Slide Rule |
| Construction | Closed frame boxwood; 26-cm x 2.4-cm; no beveled edge & no cursor. |
| Area of Use | Generic |
| Comment | Example with the Soho scale arrangement that needs no cursor. It is marked with both: Lenoir-Gravet and: Tavernier & Vinay. Vinay was a partner with Tavernier only for a short time from 1870 to 1882. They carried the Lenoir-Gravet name for posterity reasons. after both the Lenoirs and Gravet died. Their address was: 39 rue de Babylone, Paris. This example has a date of "71" hand carved into its lower edge. This model was only made for 12 years. |
| Rarity | RRR |
| Donor | Collection of Ed Chamberlain |
| Match Number | 157 |
| 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. |