Fine Swiss gold chronograph watch with register Circa 1914

Gold lever chronograph by Patek Philippe
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A very fine and rare Swiss manual wind 18K yellow gold open face pocket watch with chronograph, circa 1914. Mechanical nickel finished fully jewelled lever movement, bimetallic compensation balance, swan neck regulator. Gold cuvette. White enamel dial with black Breguet numerals, outer 60 minute divisions, two subsidiary dials indicating 30 minutes register and constant seconds. Plain case, chronograph button in the pendant. Case, dial and movement signed, case and movement numbered.
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Diameter: 56 mm.
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Signed: Patek, Philippe & Cie Genève
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Original fitted box and extract from the archives, Sold on January 1914.