Swiss silver and enamel keyless lever dress watch Circa 1925

Silver enamelled dress watch
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A fine and rare Swiss silver and enamel open faced keyless lever dress watch, circa 1925. The case back with a polychrome enamel depiction of a horse on a guilloché translucent purple enamel ground, and a translucent purple enamelled bezel on the front. Two-tone dial, Arabic hours, an outer minute track, sunk subsidiary seconds at 6 o’clock, the centre engine turned and spade hands. Lever movement. Dial signed, case and movement numbered.
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Diameter: 46 mm
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Signed: Tavannes Watch Co.