IWC - Portuguese Perpetual Calendar - Red gold Watch IW503202

44.2 mm 18K red gold case, sapphire-glass back, black dial, pellaton automatic winding calibre 51614 movement with power reserve display, perpetual calendar with displays for the date, day, month, year in four digits and perpetual moon phase for the northern and southern hemispheres, small hacking seconds, Glucydur beryllium alloy balance with high-precision adjustment cam on balance arms, Breguet spring, rotor with 18-carat gold medallion, approximately 7 days of power reserve, dark brown alligator leather strap. Water resistant to 3 bar.