BREITLING ASTROMAT CHRONOGRAPH PERPETUAL CALENDAR Reference: K18405. Serial number: 17 Case in 18k yellow gold, rotating bezel in 18k yellow gold. Black dial with four counters (seconds - date, moon phases, hours - day, minutes - month - leap year calendar). Self-winding mechanical movement. Pilot bracelet in 18k yellow gold with articulated links on a signed folding clasp. Sapphire crystal. Circa 1990. Diameter: 40 mm. Gross weight: 189.2 g. An 18k gold wristwatch automatic movement, by Breitling. Circa 1990. RC: Sold as is, traces of wear and use. Movement functional at the time of writing the description, provide for servicing, without warranty.