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Verified Auction Record
A Rare Cretes Opthalmic Slide Rule, French, circa 1875,
Description
A RARE CRETES OPTHALMIC SLIDE RULE, FRENCH, CIRCA 1875, signed in manuscript Regles Calcul du Dr A Cretes. Cretes Optician Rue de Rennes 66 Paris, brass surround, card scale and slide, instructions in manuscript on the reverse, 14in (36cm) long
