French silver verge with date and moon phases Circa 1810

Silver pocket watch with rare dial
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A French silver open faced pocket watch with date and moon phases made by Willeumier in Paris, circa 1810. Gilt jewelled movement with a verge escapement and unusual pierced spiral balance bridge. Rare, black and white enamel, day and night, 24 hour dial with Arabic hours, outer minute divisions, Arabic quarter hour numerals, date indication at 12 o’clock, phases of the moon at 6 and heavy gold spade hands. The plain case with stepped bezels and a snap on back. Dial signed, case and movement signed and numbered.
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Diameter: 61 mm
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Signed: Willeumier à Paris