Swiss extremely rare skeletonized repeating watch Circa 1815

Gold open faced pocket watch by Vaucher Frères
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A very fine, extremely rare, skeletonized, minute repeating, Swiss gentleman’s pocket watch with pin wheel escapement, circa 1815.
18 carat rose gold, engine turned case with reeded band, case maker’s punch mark “CHL”, pusher for repetition via pendant and glazed movement. Enamel chapter ring with Arabic numerals and double serpent gold hands. Skeletonized full-plate movement, keywind, frosted, gilt, florally engraved, 2 hammers, 2 two-coloured gongs in the shape of a snake, applied rack strike with mirror-polished steel levers, pin wheel escapement and three-arm ring balance.
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Diameter: 57 mm
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Weight: 104 g
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Signed: Vaucher Frères
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Vaucher Frères à Fleurier
Founded by Alfred Vaucher at Fleurier. After his death in 1840 the sons Alfred, Edouard and James-Henri continued the business and specialized on dealing in Chinese clocks. In 1843 they opened a branch in Kanton and later another one in Shanghai. Also a ship’s chronometer dated around 1860 and signed “Vaucher Frères” is known.