Rare French silver watch with dual time and calendar Circa 1810

Extremely rare calendar pocket watch
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An Extremely rare French silver verge watch with dual time and calendar, circa 1810. Full plate movement, keywind, frosted, gilt with two chains/fusees, solid movement pillars, three-arm balance, and fine florally engraved and pierced balance bridge with polished steel coqueret. Two winding barrels, two movements, two fusees and only one crown wheel. Silver polished case with case maker’s punch mark PH,
White enamel dial, dual time zone, dials with gold Arabic numerals and black Arabic numerals, subsidiary calendar dial with days and date.
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Diameter: 60 mm
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Weight: 123 g
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Signed: Audebert à Paris
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Audebert, Paris (Rue Montagne, St.Genevieve) 1807-1825.
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Reference 06000