Ca. Ø51mm, ca. 101g, 18K gold, à-goutte case, punched FFC No.7, extremely rare verge movement with 4 complications, display of the day of the week, the corresponding planetary signs, the date and the month, all via 5 central gold hands, enamel dial on both sides, intact, in very beautiful condition. The 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. The watch here proofs that they also made technically highly complicated and extraordinarily rare astronomical watches for the time before 1800.