Swiss 18K gold quarter repeating musical pocket watch Circa 1820

Gold repeating cylinder 
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A large impressive gold pocket watch with striking mechanism and musical movement, probably from Geneva, circa 1820.
Fine calibre, cylinder movement, quarter-repeater, a musical movement which releases hourly and can also be released by a slide at will. Beautiful signed enamel dial (professional restoration) with Breguet-style radial hours, outer minutes track, and blued hands. 18K gold engine turned case, No. 9387.
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Diameter: 58.5 mm
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Weight: 135 g
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Signed: Charles Frederic Robert