Excellent Swiss quarter repeating musical watch Circa 1820

Gold musical cylinder pocket watch
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An excellent Swiss 18K gold musical cylinder watch playing on the hour or at will, with quarter-repeater, circa 1820. Engine-turned case, gilt hinged cuvette, ribbed band, bolt at 7 o’clock to activate the music, lever at 9 o’clock protruding from under the cuvette for music/silent.
Gold dial, engine-turned wave pattern, champlevé Roman numerals, outer minute dot divisions. Blued steel Breguet hands. Gilt brass, fixed barrels, cylinder escapement, three-arm gold balance with flat balance spring, sur plateau pinned disc musical movement, 24 tuned vibrating blades acting on both sides of the pinned disc, repeating on gongs by depressing the pendant.
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Diameter: 58 mm
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Weight: 130 g
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Signed: No Name
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Reference 0052000