Swiss platinum open faced keyless lever dress watch Circa 1950

Platinum dress watch by Vacheron & Constantin
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A very fine, elegant, manual wind, platinum, open faced, Swiss pocket watch with an 18K white gold and diamond chain, circa 1950.
Matte silver dial with applied white gold faceted baton indexes, outer minute divisions and original pink gold baton hands. Solid case, polished and brushed. Rhodium-plated movement. Dial, case and movement with signature.
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Diameter: 47 mm
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Signed: Vacheron & Constantin Genève