Full Details

Name and Model Number Tavernier-Gravet
Pocket Slide Rule
with Magnifying Cursor
Country of Origin France
Date of Manufacture c. 1920
Front Scales A [ B C ] D
Back Scales [ S L T ]
Scale Length 12.5 cm
Type of Rule Slide Rule
Construction Celluloid laminate on boxwood, 15 cm x 2.8 cm, with magnifying cursor.
Area of Use Generic
Comment Math constants on back. Marked: Tavernier-Gravet,
Rue Mayet 19, Paris. Dated 8-20.
Rarity RRR
Donor Collection of Ed Chamberlain
Match Number 193
(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.