Swiss gold Chronometer Gondolo pocket watch Circa 1905

Gold watch made for Gondolo & Labouriau
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A Swiss 18 carat yellow gold keyless Chronometer Gondolo pocket watch, made by Patek, Philippe & Cie. Genève, circa 1905. Especially made for Gondolo & Labouriau, Rio de Janeiro, Brazil. Name of the owner on the dial: Fernado de Moraes Sarmento.
A polished open faced case with a hinged gold cuvette and an engine turned case back. Cuvette is engraved with the mention: chronometro gôndola/Fabricado expressamente para Gôndola & Labouriau Relojoeiros/Rio de Janeiro.
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White enamel dial with radial Arabic numerals, outer minute track, sunk subsidiary seconds and yellow gold spade hands. A gilded brass movement, with going barrel, train of gold wheels, straight line equilibrated lever escapement, à moustaches, compensated balance with gold poising screws and blued steel hairspring with terminal curve, patented index regulator with swanneck spring and micrometric screw. Dial, case and movement are signed.
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Diameter: 51 mm
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Signed: Patek, Philippe & Cie.  Genève
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Movement based on the French invention patent No. 142 376, delivered on April 16, 1881, to Jean-Adrien Philippe 1815-1894, Geneva, for a régulateur de precision (precision-regulating device for fast/slow by means of an eccentric snail). Movement also based on the Swiss invention patent No. 2 680, delivered on September 27 1890, to Patek, Philippe & Cie, Geneva, for a Remontoir avec mise à l’heure perfectionné (the definitive version of the keyless winding and setting device), and, on the US design patent No. 20 483, delivered on January 13, 1891, to Adrien Philippe, Geneva, for a Watch bridges for Watch Movements.