Swiss 18k gold open faced Chronometre Royal Circa 1910

Gold open faced lever by Vacheron & Constantin
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A Swiss 18 carat gold open faced ankerchronometer pocket watch, circa 1910. Largest and heaviest version of a Chronometre Royal. Ankerchronometer movement, fine adjusting device, wolf’s toothing. White enamel dial with Roman numerals and gold hands. Engine turned case. Dial, movement and dome signed, case and movement numbered.
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Diameter: 57 mm
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Weight: 135 g
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Signed: Chronometre Royal Vacheron & Constantin Genève