Swiss gold trip quarter repeating keyless pocket watch Circa 1890

Gold hunting cased lever watch
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A very rare Swiss 18K yellow gold hunting cased, trip quarter repeating, two-train, keyless pocket watch, circa 1890. An entirely finely and deeply engraved case with scrolls and foliage, a button at 2 for the trip-repeat and a hinged gold cuvette. White enamel dial, radial Roman numerals, outer minute track, subsidiary seconds. The gold arrow hands each set with a faceted stone. A rhodium-plated movement, Geneva striping decoration, tandem winding, 31 jewels, counterpoised and calibrated straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, index regulator, repeating the hours and quarter hours with two hammers on two gongs activated by depressing the button on the band. Dial, case, cuvette and movement signed.
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Diameter: 50 mm
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Signed: Patek, Philippe & Co.  Genève
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Patek Philippe started making double-train trip repeaters around 1890 and continued producing them, in very limited quantities, over the next 25 years. There are very few examples known, the quarter repeating version being particularly rare.