Swiss silver duplex watch for the Chinese market Circa 1840

Silver watch with jumping centre seconds
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A large pocket watch for the Chinese market with duplex escapement in excellent condition, signed by Bovet Fleurier, circa 1840. A silver signed Chinese case, glazed movement with spring lid, splendidly engraved gilt Fleurier duplex movement, signed, key winding, original enamel dial, jumping centre seconds, probably original key, very beautiful condition.
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Diameter: 56 mm
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Weight: 100 g
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Signed: Bovet Fleurier