Swiss 18k yellow gold Chronometro Gondolo watch Circa 1912

Gold keyless lever pocket watch 
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A very fine, large Swiss, 18K yellow gold, keyless, Chronometro Gondolo pocket watch, circa 1912. Accompanied by the original Patek Philippe morocco fitted box, original Certificat d’Origine, spare crystal and the Extract from the Archives. Made for Gondolo & Labouriau, Rio de Janeiro, in 1912, sold on January 31, 1914. A polished case with an engine-turned back cover. Hinged gold cuvette.
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White enamel dial with radial Roman numerals, outer minute track and Arabic five-minute numerals, subsidiary seconds. Gold spade hands. A frosted gilt movement, bar calibre, 18 jewels, wolf’s tooth winding, gold wheel train, straight-line moustache lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, Patek Philippe patented micrometre cam regulator. Dial, case, cuvette and movement signed.
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Diameter: 56 mm
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Signed: Patek Philippe & Cie. Genève