An extremely rare Swiss gold lever chronograph watch Circa 1871

Gold full hunter with flyback register by Patek Philippe & Co.
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An exceptionally rare and exquisite Swiss gold keyless hunting cased lever chronograph watch featuring a 15 minute register sector, circa 1871. This watch features a frosted gilded movement with wolf’s tooth winding and a steel chronograph mechanism partially visible through the backplate. It includes an extra half toothed sprung wheel that operates the flyback mechanism of the minute recorder, a bimetallic compensation balance, and a blued steel overcoil spring. The white enamel dial displays Roman numerals, an outer track for minutes, a chronograph seconds track, blued steel moon hands, recessed subsidiary seconds, and a sector for the 15 minute flyback register. The case is made of 18 carat gold with polished covers, a chronograph locking slide on the band, and a polished gold cuvette signed Patek Philippe & Co., Genève, with both the back cover and cuvette numbered.
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Diameter: 50.5 mm
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Signed: Patek Philippe & Co., Genève
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The Patek Philippe Archives state that this watch was manufactured in 1870 and sold on 31 August 1871. It confirms that this is the earliest Patek Philippe chronograph featuring a register and the only known example with a flyback 15 minute recorder.
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The movement is operational. The surfaces appear in good condition, with minor scuffs and scratches. The chronograph starts, stops, and resets; however, when running the minute register, it does not advance past the 14 minute mark. The dial is in good condition but has a few minor scratches. The case is in good repolished condition.