This watch is also known as: IW5021-19 502119 IW502119 IWC Portuguese Perpetual Calendar Red Gold watch is pre-owned and in mint condition. Comes with box and papers.brThe features of IWC Portuguese Perpetual Calendar Ref No:502119 ( IW5021-19)brMovement: mechanical with automatic winding; IWC Caliber 51613; 62 jewels; 21600 vph; patented Pellaton winding system gives approx. 7 days (168 hours) power reserve.brFunctions: hours minutes subsidiary seconds; perpetual calendar (date day month 4-digit year; moon phase); power reserve indication.brCase: in 18 karat red gold; 42.3 x 15.6 mm (excl. lugs and crown); sapphire crystal; red gold crown; screw-on case back with sapphire exhibition window. Water-resistant to 30 meters.brDial: black; applied red gold Arabic numerals; red gold leaf-shaped hands; printed railway minute track.brIndications: date and power reserve indication at 3; month at 6; 4-digit year between 7 and 8; subsidiary seconds and day at 9; moon phase at 12.brStrap: brown alligator strap with matching red gold deployant clasp.brAll this features make Portuguese Perpetual Calendar a unique perfect timepiece.