Dual sided verge with tidal/moon age indication Circa 1830

An English silver key wind dual sided open faced pocket watch with tidal and moon age indication, circa 1830. Fusee verge movement. One side with white enamel dial, black Roman numeral hour markers, subsidiary dials for day, date and month indication, the other dial with white enamel, subsidiary dials for dual time in hours, minutes and regulator, tidal indication and moon age, central rotating seconds and gilt hands. Polished case.
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Diameter: 55 mm
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Signed: No name