Swiss gold enamel watch for the Chinese market Circa 1830

Gold pocket watch with jumping centre seconds and gold enamel key
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A very fine gold enamel pocket watch with jumping centre seconds and original gold enamel key for the Chinese market  “bouquet of summer owers”, circa 1830.
Gold case, polychrome enamelled back side with a fine composition of summer owers, band and pendant with champlevé enamel, the pendant and bezels set with half pearls. Enamel dial, radial Roman numerals, jumping centre seconds, blued spade hands. Bridge movement, florally engraved, frosted, gilt, keywind, going barrel, Chinese duplex escapement, steel balance with 3 blued weights.
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Diameter: 57 mm
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Weight: 117 g
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Signed: Fleurier