Swiss gold double sided astronomical pocket watch Circa 1780

Gold complicated watch by Francois et George Archard
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A rare, double sided astronomical Geneva verge pocket watch with four complications and five central hands, circa 1780.
Extremely rare verge movement with four complications. Enamel dial on both sides; frontside with Roman radial hours, outer minutes track with Arabic fifteen minutes numerals, the month, and three gold hands; backside with a display of the day of the week, the corresponding planetary signs, the day of the month, and two gold hands. 18 Carat gold à-goutte (water drop shaped) case, punched FFC No.7.
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Diameter: 51 mm
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Weight: 101 g
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Signed: Francois et George Archard
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This watch is a real rarity from a technical point of view. Most early astronomical pocket watches have several sub dials for the different calendar functions; on this watch, all indications are read via central hands. The gold cased version is also extremely rare; these watches usually have silver cases. The Achard brothers mainly produced very fine enamel watches and highly complicated automata. This watch proves that they also made technically highly complex and extraordinarily rare astronomical watches before 1800.