Silver Swiss watch with fly spring mechanism Circa 1840

)pen faced cylinder pocket watch
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An original silver case with Chinese signature, very beautiful silver dome with floral engraving, circa 1840.
Fly spring mechanism, fire-gilt Fleurier movement with cylinder escapement, barrel drum with Chinese signature, original enamel dial, steel hands, case with small imperfections,
movement intact.
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Diameter: 56 mm   Weight: 105 g
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Signes: Bovet  Fleurier