Swiss gold, turquoise and diamond-set pendant watch Circa 1890

Gold open faced keyless lever
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A fine Swiss 18K gold, turquoise and rose-cut diamond-set keyless pendant watch, circa 1890. The back cover with an applied monogram BA set with turquoise and rose-cut diamonds over a further engraved monogram. Hinged gold cuvette engraved 1er Janvier 1895. White enamel dial, radial Roman numerals, outer minute track with Arabic five-minute numerals and gold spade hands. A frosted gilt movement, 15 jewels, wolf’s tooth winding, straight line moustache lever escapement, cut-bimetallic compensation balance with Breguet balance spring, index regulator. Dial, cuvette and movement signed.
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Diameter: 31.5 mm
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Signed: Patek, Philippe & Co  Genève