French 18 carat gold skeletonized quarter repeater Circa 1820

Gold decorative skeletonized repeater by Berthoud
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A very decorative, French skeletonized quarter repeating gentleman’s pocket watch, circa 1820.
The 18 Carat rose gold engine-turned case has a reeded band, case maker’s punch mark I.F, and glazed movement. The dial has a signed enamel chapter ring with Arabic numerals and blued Breguet hands. And the skeletonized full-plate movement is keywind, frosted, gilt, florally engraved and signed, and has two hammers, two gongs, applied rack strike with mirror-polished steel levers, verge escapement, three-arm brass balance, and pierced balance bridge.
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Diameter: 54 mm
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Weight: 107 g
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Signed: Berthoud à Paris