Full Details

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
(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.