French 18K gold pocket watch with on demand striking Circa 1830

Open faced keywind pocket watch
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A Swiss 18 carat pink gold verge keywind open faced pocket watch with on demand striking and reminder complication, made by Michel in Bourbonne, circa 1830. This watch features a verge movement with on demand striking, a white enamelled dial with Arabic numerals for hours and day of the month, an outer minute track, blued steel Bréguet hands, and a smooth 18 carat pink gold case.
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Diameter: 52 mm
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Weight: 100 g
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Signed: Michel à Bourbonne