Swiss 18K gold chronograph anker chronometer Circa 1915

Rose gold chronograph by Vacheron & Constantin
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A Swiss 18 carat rose gold ankerchronometer with special chronograph, circa 1915. Retailed by Mascort & Bonturi Buenos Aires. Top class ankerchronometer, extra large chronometer balance, very fine chronograph with polished, angled steel parts and production counter/number of pieces register. Extremely rare white enamel dial with red production counter and rose gold hands. Engine turned case. Cuvette inscribed: Vacheron & Constantin Genève Fabrication Speciale pour Mascort & Bonturi. Case numbered, dial signed, movement signed and numbered.
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Diameter: 51 mm
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Weight: 115 g
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Signed: Vacheron & Constantin Genève
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Mascort & Bonturi was a popular shop for fine clothing in Buenos Aires. Chronographs with production counter are extremely rare. We are not aware of any other Vacheron & Constantin chronograph with this dial. The indication on the dome could mean that it is a special design for the man’s outfitter to measure the number of pieces in certain production processes. The counter starts at 90 and ends at 12 which means 12 pieces per minute. The graduation is accurate to 1/5 of a second!