Full Details

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
(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.