Unusual English complicated musical coach watch Circa 1794

Complicated coach watch for the Chinese market by William Carpenter
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An unusual English gilt metal two train musical coach watch with sweep center seconds, calendar and moonphases made for the Chinese market, circa 1794. Gilt finished full plate two train verge movement, pierced and engraved balance cock, turned balluster pillars, pinned musical drum playing three different tunes (Cotillion, Lovely Nancy and Minuet) with six hammers onto five inverted nesting bells. White enamel dial, eccentric hour dial with Roman numerals, outer Arabic five minute divisions, sweep center seconds, two subsidiary dials indicating phases and ages of the moon and the choice of music. Large case with finely pierced and engraved scroll decorated band and centered by a sprig of flowers, music start/stop and balance start/stop levers in the band. Associated later outer case. Dial and movement signed.
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Diameter: 78 mm
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Signed: William Carpenter London