Rare English gilt, enamel and pearl-set coach clock Circa 1780

Gilt verge watch made for the Chinese market
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A rare and large English gilt, enamel and pearl-set pair-cased coach clock made for the Chinese market circa 1780. The outer case is adorned with floral engravings and polychrome enamel painting on the back. The front with green stones and pearls, and the inner case is smooth. It features an original white enamel dial with Roman hour markers, Arabic minute markers, a subsidiary dial for the seconds, and blued steel hands. The fire gilt verge movement has stoppable seconds. The movement is signed and numbered, the case is also numbered, and matching numbers are present on both the case and movement.
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Diameter: 82 mm
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Weight: 326 g
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Signed: Tim. Williamson London
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Watchmaker of the Emperor of China, Qianlong, Timothy Williamson, London.