Fine Swiss platinum open faced keyless dress watch Circa 1930

Platinum lever pocket watch
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A Swiss platinum open faced keyless pocket watch made by Vacheron Constantin SA in Geneva, circa 1930. A solid, plain case. Silvered dial with Arabic hour numerals, outer dot minute divisions, subsidiary seconds at 6 o’clock and platinum Breguet hands. Rhodium plated movement with 18 jewels, a straight line lever escapement, cut bimetallic compensation balance adjusted to eight positions, flat balance spring and an index regulator. Dial and movement are signed.
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Diameter: 44 mm
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Signed: Vacheron & Constantin Genève
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The movement was sold in New York in 1930.