Swiss 18 carat gold open faced lever pocket watch Circa 1910

Gold lever by Vacheron & Constantin
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Very fine Swiss 18 carat gold open faced keyless wind lever pocket watch, circa 1910. Gilded brass movement with going barrel, straightline lever escapement, compensation balance with gold poising screws and blued steel Breguet hairspring. White enamel dial with Arabic numerals and subsidiary seconds at 6. Case guilloché engine turning to the back. Dial signed, case and movement signed and numbered.
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Diameter: 49 mm
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Signed: Vacheron & Constantin Geneve