Swiss gold astronomical double wheel duplex watch Circa 1800

Gold open faced astronomical clockwatch
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An important Swiss 18 carat gold astronomical pocket watch with equation and double wheel duplex escapement, circa 1800. Frosted, gilt full plate movement, blued screws, double wheel duplex escapement, three armed brass balance, blued balance spring, pierced and engraved balance bridge, silver regulator disc. White enamel dial with Arabic numerals, decorated with polychrome enamel, subsidiary dials for day and date, sunrise and sunset time and an aparture for sun and moon indication, blued steel hands. Plain case.
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Diameter: 58 mm
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Weight: 143 g
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Signed: Jean Pierre Juillerat Swiss