Swiss yellow gold hunting cased lever watch Circa 1920 

Gold hunting cased lever watch
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A Swiss yellow gold hunting cased keyless lever watch with enamel dial, circa 1920, gilt lever movement, 15 jewels, bimetallic balance •

White enamel dial, Breguet numerals and hands, outer minute track for 24-hour indication, sunk subsidiary dial for constant seconds, 18k yellow gold case, case, cuvette, dial and movement signed.
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Diameter: 50 mm
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Signed: Patek Philippe & Cie Geneve Suisse
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Accompanied by an Extract from the Archives confirming production with enamel dial in 1920 and sale in 1925.