Swiss gold quarter repeating musical watch Circa 1810

Gold open faced repeating watch with musical movement by Dubois & Fils
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A Swiss 18 carat gold open faced quarter repeating pocket watch with musical movement that activates on the hour and can also be activated manually, playing God save the Queen, circa 1810.
Full plate movement, two barrels, two hammers, two gongs, musical disc movement with steel blades, cylinder escapement, three armed ring balance. Cream enamel dial with Roman numerals. Engraved case, blank cartouche to the back.
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Diameter: 54 mm
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Weight: 123 g
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Signed: Dubois & Fils Le Locle