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圖錄編號
318
圖錄編號 318
初步估價 1,300 - 2,000 €
This is a lot of a former auction!

Droz & Cie., St. Imier, Brevete, S.G.D.G.,52 mm, 115 g,約 1900

極罕見的聲波/測音器,附兩錶盤,15秒碼錶,測距儀,公里數顯示及指南針。這是附於碼錶,專門為測量從工作站到引爆現場的炸藥所發出的聲波距離的安全儀器,附錶盒


Droz & Cie., St. Imier, Brevete, S.G.D.G., 52 mm, 115 g

, circa 1900

An extremely rare phonotelemeter with two dials, comprising fifteen 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. With box.


Case: silver, tiered, small wheel in the bottom part of the band for the distance gauge. Dial: front side - enamel, Arabic numerals, outer 15 seconds chronograph, inner 5 kilometer telemeter ring, blued pointer, signature: "Mr le Ministre de la guerre appelle l'attention de M. M. les officiers sur l'emploi de ce Phonotélémètre" ("The Minister of War informs the officers on the use of the sound telemeter"). Back side - enamel, radial Roman hours, outer gauge scale calibrated for 20 kilometers, inner gauge scale calibrated for 15 kilometers, blued spade hands. Movm.: mechanical bridge movement, nickel-plated, lever escapement.
#39544
錶殼 非常好, 少有使用過
錶盤 非常好
机蕊 非常好, 走動正常, 建議整修


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