Swiss platinum and black lacquered pearl- and onyx set watch Circa 1925

Diamond set watch with cameo
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A very fine and rare platinum and black lacquered diamond- pearl- and onyx set pendant watch with cameo. Accompanied by a matching black lacquer and pearl chain and the set made by Vacheron & Constantin in Genève, Switzerland circa 1925. Rectangular, black lacquered case its front with a cameo panel framed by diamond set platinum bars and the front with a platinum and diamond bezel.
Silvered dial with a circular centre, Arabic numerals, outer minute track and blued steel Breguet hands. Nickel plated movement with 18 jewels, straight-line lever escapement, cut bimetallic compensation balance with 5 adjustments and flat balance spring.
Dial and movement signed.
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Dimensions:. 25 x 33 mm
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Signed: Vacheron & Constantin, Genève