Splendid Swiss gold Chronometro Gondolo with 24h dial Circa 1905

Gold keyless lever by Patek Philippe
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A fine and rare Swiss, 18 carat pink gold keyless Chronometro Gondolo with 24-hour dial, circa 1905. Retail by Gondolo & Laboriau, Relojoeiros, Rio de Janeiro. An engine-turned case, the back with a foliate monogram. Hinged gold cuvette. White enamel dial with radial Arabic numerals, red chapters 6-12-18-0 (24), outer minute track, subsidiary seconds and gold spade hands. A gilt brass movement, gold wheel train, 20 jewels, wolf’s tooth winding, straight line lever escapement à moustaches, cut bimetallic compensation balance, blued steel Breguet balance spring with Patek Philippe patented micrometric index. Dial, case and movement signed.
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Diameter: 56 mm
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Signed: Patek, Philippe & Cie Genève
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Accompanied by an extract from the archives.
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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”.