Lot No. 333* (93rd Auction)
Droz & Cie., St. Imier, Brevete, S.G.D.G., Case No. 496566, 50 mm, 104 g, circa 1850

An extremely rare phonotelemeter with two dials, comprising five seconds chronograph, ten minutes register, sound telemeter, kilometer gauge and compass - a device consisting essentially of a stopwatch, for estimating the distance of guns in action by measuring the interval between the flash and the arrival of the sound waves from the discharge.
Case: silver. Dial: enamel, signed 'Hommage du Captain Chouvenin (Inventeur) à Mr. Le Général de Division - Directeur de L'Artillerie'. Movm.: 1/2 plate movement, screw compensation balance.
Estimate  900 - 1,500 €

Price Realised  1,300 €
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