Swiss silver open faced lever keyless pocket watch Circa 1906

Silver watch with engraved monogram
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A Swiss silver keyless pocket watch, circa 1920. Accompanied by the original Vacheron Constantin fitted box and original Certificate of Origin. A polished case, the back cover with engraved monogram JB. Hinged silver cuvette engraved 19 March 1921. White enamel dial with Breguet numerals, outer minute track, subsidiary seconds and yellow gold Breguet hands. Matte gilt movement, 15 jewels, straight line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, index regulator. Dial, case, cuvette and movement signed.
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Diameter: 50 mm
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Signed: Vacheron Constantin  Genève
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Accompanied by the box and Certificate of Origin
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A rare example of a Vacheron Constantin silver cased watch in extremely good condition with perfect enamel Breguet dial. Exceptionally, the original box and certificate survive and confirm the silver monogrammed case