Impressive Swiss 18K gold Chronometre Royal Circa 1910

Gold ankerchronometer by Vacheron & Constantin
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An impressive Swiss 18-carat gold open faced ankerchronometer pocket watch, Chronometre Royal, circa 1910. High-quality ankerchronometer movement, extra-large balance, wolf’s toothing, fine adjusting device. White enamel dial with Arabic hours and outer minute divisions, subsidiary seconds, and rose gold hands. Engine-turned case. Case numbered, dial signed, cuvette signed, movement signed and numbered.
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Diameter: 57 mm
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Weight: 138 g
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Signed: Vacheron & Constantin Genève Chronometre Royal