Fine French/Swiss gold repeating musical watch Circa 1820

Gold open faced cylinder watch 
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A French/Swiss 18K gold quarter repeating musical pocket watch with barillet-type pinned cylinder musical movement, circa 1820. An Empire case, engine-turned back with a reeded band and bezel, bolt for music activation in the band. Hinged gilt metal cuvette. Gold dial with Arabic numerals on circular white enamel cartouches, engraved leaf chapter ring, outer minute track, engine turned centre and blued steel Breguet hands.
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A frosted and gilt movement fixed standing barrels for both trains, cylinder escapement with plain three-arm brass balance and flat balance spring, index regulator, polished steel endplate, repeating on gongs activated by depressing the pendant. Cylinder musical train playing on the hour or at will, pinned cylinder and 37 tooth comb grouped in trios and pairs, gilt-brass cover over the musical movement engraved with a musical score. Cuvette signed.
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Diameter: 59 mm
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Signed: Breguet et Fils  Paris/Swiss
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Slightly restored soft enamel on the dial.
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The movement of this watch is the rare barillet-type with pinned cylinder, a miniature version of the type of movements found in full-size musical boxes. Most makers during the early 19th century used the sur-plateau type movement with a flat pinned rotating disc as opposed to a cylinder. The cylinder type is more robust and gives a more resonant sound, but requires a thicker case to house it.