Swiss 14k gold half hunter with florally engraving Circa 1890

Gold cylinder with jump-hours and minutes
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A fine Swiss, 14K gold keyless jump-hours and minutes, lady’s digital pendant watch, circa 1890. Using the A. Kaiser system, patented on 24 February 1885. An engine-turned and foliate engraved covers, back with vacant cartouche, reeded band. Hinged gold cuvette engraved Colibri. Matte silver dial with black scroll decoration, apertures for the hours and minutes, with the inscription: Patent. A gilt brass movement, 15 jewels, cylinder escapement, three-arm brass balance, flat balance spring, index regulator.
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Diameter: 37 mm
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Signed: No Name
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The case with dents and the dial is slightly oxidized.