Swiss 14 carat gold open faced lever pocketwatch Circa 1916

A Swiss 14 carat gold open faced keyless pocket watch, circa 1916, manual winding jewelled gilt movement, bimetallic cut compensation balance. White enamel dial, painted Roman numerals, subsidiary seconds and outer minute track. Polished case, hinged cuvette. Case, dial and movement signed. With an Extract from the Archives confirming sale on March 13th 1918.
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Diameter: 50 mm
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Signed: Patek Philippe & Cie Genève