Elegant Swiss platinum Art Deco lever dress watch Circa 1920

Platinum open faced lever watch by Vacheron & Constantin
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A very fine and elegant Swiss platinum open faced Art Deco lever dress watch, circa 1920. Rhodium plated movement, 18 jewels, 8 adjustments, straight-line lever escapement, cut bimetallic compensation balance with flat balance spring. Satine silver dial with applied gold Arabic numerals, outer dot minute divisions, subsidiary sunk guilloché seconds dial and original gold Breguet hands. Polished and brushed case, stepped bezel and back rim. Dial and movement signed, case numbered.
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Diameter: 45 mm
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Thickness: 8 mm
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Signed: Vacheron & Constantin Genève Suisse