Swiss gold full hunter lever with Guillaume balance Circa 1911

Lever with Guillaume balance by Patek Philippe
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A fine and heavy Swiss 18 carat gold hunting cased lever watch with Guillaume balance, circa 1911. Nickel finished Extra keyless lever movement, 20 jewels, Guillaume balance with gold and platinum poising screws, cam wheel regulator, diamond endstone, wolf’s tooth winding. Hinged cuvette. White enamel dial with Breguet numerals, outer railway minute divisions and subsidiary seconds. Large plain case. Case, cuvette, dial and movement signed.
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Diameter: 58 mm
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Signed: Patek Philippe & Cie Genève