Swiss gold repeating watch with musical movement Circa 1820

Gold cylinder pocket watch attributed to Isaac Daniel Piguet Genève
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An exceptionally large, quarter repeating Swiss pocket watch with striking mechanism and musical movement, circa 1820.
Engine turned 18K pink gold case. Gold engine turned dial with Roman radial hours, outer minutes track, gilt hands, and engraved centre. Very rare calibre, quarter repeater and musical movement under the dial, cylinder escapement. A tiny button activates the musical movement in the case band.
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Diameter: 58 mm
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Weight: 133 g
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Signed: No name