Platinum, gold, onyx, diamond set pendant watch Circa 1930

Keyless lever pendant watch by Vacheron & Constantin/Verger Frères
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A fine and rare Swiss platinum, gold, onyx and diamond set keyless lever pendant watch, circa 1930. Circular nickel finished lever movement. Silvered dial and quarters with Arabic numerals.  Square onyx and platinum case, octagonal gold lunette with lozenge motif, decorated with white enamel, gold borders and small rose cut diamonds, suspended by a three strand chain with alternating onyx, pearl and diamonds, black enamel, pearl and diamond white gold brooch. Movement signed and numbered, case numbered and stamped VF for Verger Frères.
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Width: 25 mm
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Signed: Vacheron & Constantin Genève