Swiss 18K yellow gold open faced keyless pocket watch Circa 1930

Gold lever pocket watch by Vacheron Constantin
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A beautiful, 18K yellow gold, enamel, keyless Swiss pocket watch by Vacheron & Constantin, Genève, circa 1930. Polished, hinged gold cuvette. Enamel dial with Arabic radial hours, outer minutes track, subsidiary dial for the seconds, and gold original hands. Frosted gilt movement, 18 jewels, straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, index regulator, and manual mechanical movement. Case, dial, and movement signed.
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Diameter: 52 mm
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Weight: 87 g
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Signed: Vacheron Constantin Genève