French verge watch with regulator dial and calendar Circa 1790

Silver open faced pocket watch with calendar 
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A French verge pocket watch with regulator dial and calendar, circa 1790.
Silver polished and tiered case. Enamel dial with eccentric hour dial with Arabic numerals, centre seconds, eccentric dials for date and month and pierced hands. Full plate movement, keywind, frosted and gilt, with chain/fusee, solid movement pillars, three-arm brass balance and engraved and pierced balance bridge.
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Diameter: 52 mm
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Weight: 80 g
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Signed: ICIB