English gilt pocket watch for the Chinese market Circa 1820

Large pocket watch with duplex escapement
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Large pocket watch for the Chinese market, made by William Ilbery in London, England, circa 1820. The plain open faced gilt case of this watch has a spring lid function. The restored white enamel dial of this watch has black Roman hour numerals, a subsidiary seconds dial with black Arabic numerals and gold hands. The magnificently decorated  numbered movement has a duplex escapement and a diamond end stone.
Dial and movement signed.
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Diameter: 59 mm
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Weight: 142 g
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Signed: Ilbery, London