IWC PORTUGIESER ANNUAL CALENDAR
Mechanical movement. IWC-manufactured 52850 calibre. Power reserve display. Case height 15.3 mm. Pellaton automatic winding. 7-day power reserve when fully wound. Annual calendar with displays for the date day and month. Small hacking seconds at 9 Oclock. Rotor with 18-carat gold medallion. Diameter 44.2 mm. Glucydur®* beryllium alloy index less balance with high-precision adjustment screws on balance.