Full Details


Name and Model Number Tavernier-Gravet 50 cm
Règle à Calculer
with Chisel Cursor
Country of Origin France
Date of Manufacture c. 1867 - 1872
Front Scales A [ B C ] D
Back Scales [ S L T ]
Scale Length 50 cm Mannheim
Type of Rule Slide Rule
Construction Closed frame boxwood; no laminate. No beveled edge. Chisel cursor with open window. In mahogany wood box with hinged lid.
Area of Use Generic
Comment Marked "TAVERNIER-GRAVET SUCCR, 39 RUE DE BABYLONE, PARIS". Address and maker dates this slide rule to 1867 to 1872.
Rarity RRR
Donor Collection of Ed Chamberlain
Match Number 191
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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.