Rare watch pocket circular slide rule Charpentier with leather pouch & doc. 1881 for Sale

Rare watch pocket circular slide rule Charpentier with leather pouch & doc. 1881 For Sale

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Rare watch pocket circular slide rule Charpentier with leather pouch & doc. 1881:
$360.00

Rare watch pocket circular slide rule Charpentier
with leather pouch and French copies of notice (2 pages)
and 1881 illustrated patent (5 pages) The emblem of the Oughtred Sociey.
It is written on front \" CALCULIMETRE G. CHARPENTIER BREVETE S.G.D.G.\"This Charpentier watch circular slide rule is in perfect condition.
It belonged to the chairman of a big French Society
\"Le Carbone\" started in 1892 became in 1937 \"Carbone Lorraine\"
so the name \"Le Carbone\" is nicely engraved on the back of this watch pocket circular slide rule (see photo 5)The pouch suits perfectly but, I think, is not the original.If you wish other informations about this pocket circular slide rule, clik on the very interesting link below (item 14)More information