Impressive gilt hour striking musical coach watch Circa 1790

Gilt metal, paste, pearl set musical duplex with centre seconds by Brockbank
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An impressive and very rare English gilt metal, paste and pearl set two train pair cased open faced hour striking stop center seconds musical coach watch made for the Chinese market, circa 1790.
Full plate gilt finished two train movement with finely engraved floral decoration, chain fusee, duplex escapement, musical pin barrel, playing on a nest of five bells via five steel hammers either on the hour or at will, finely pierced and engraved foliage decorated dust cover. White enamel dial with Roman numerals, outer Arabic five minute divisions and centre seconds. Large inner case with finely pierced and engraved foliage decorated band, a large cartouche with engraved trophy of music, similarly decorated outer case with alternating split pearl and ruby paste set bezel, centre seconds and en passant music start/stop levers in the bezel, green cord and tassels. Movement and dust cap signed, inner case stamped with casemaker’s initials ‘W’.
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Diameter: 152 mm
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Signed: Brockbank London