Swiss 18K yellow gold Chronometro Gondolo watch Circa 1911

Gold open faced lever pocket watch 
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A very fine Swiss, 18K yellow gold, keyless Chronometro Gondolo pocket watch, circa 1911. Accompanied by the original leather fitted box. A Patek, Philippe & Cie., Genève made for Gondolo & Laboriau, Relojoeiros, Rio de Janeiro. An engine-turned back. Hinged gold cuvette. White enamel dial with radial Roman numerals, outer minute track with five-minute radial Arabic numerals, subsidiary seconds. Gold spade hands. A gilt brass movement, patented bridge calibre, 21 jewels, wolf’s tooth winding, gold train, straight-line moustache lever escapement, cut bimetallic compensation balance with blued steel Breguet balance spring, Wilmot’s patented micrometric cam regulator. Dial, case, cuvette and movement signed.
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Thickness: 13 mm
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Diameter: 51 mm
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Signed: Patek, Philippe & Cie  Genève