Fine Swiss yellow gold ‘Art Deco’ open faced watch Circa 1929

Yellow gold ‘Art Deco’ open faced watch by Patek Philippe
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A fine Swiss yellow gold ‘Art Deco’ open faced watch, circa 1929.
Silver nickel lever escapement movement, cut bimetallic balance with peripheral timing screws and blued Breguet balance spring with terminal curve, wolf’s tooth winding mechanism.
Silvered dial, applied gold indexes, gold dauphine hands, outer circular grained minute track, 18k yellow gold case made by Eggly & Cie, case, dial and movement signed.
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Diameter: 44 mm
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Signed: Patek, Philippe & Cie Genève
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With an Extract from the Archives confirming manufacture in 1929 and sale in 1940.