French rose gold quarter repeating pocket watch Circa 1800

Open faced pocket watch by Berthoud
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A French fine quarter repeating verge pocket watch, circa 1800.
The engine turned case is 18 carat rose gold with case maker’s punch mark “P&S”; the signed dial is white enamel with Breguet hands and the Breguet’s Arabic numerals and the movement is a full plate movement with chain/fusee, 2 hammers / 2 gongs and a three-arm brass balance.
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Diameter: 55 mm
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Weight: 122 g
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Signed: Berthoud à Paris