IWC’s perpetual calendar, developed by Kurt Klaus in the 1980s, automatically recognizes the different lengths of the months and the leap years and can easily be adjusted via a single crown.
Stainless steel case Diameter 42.4 mm Height 13.8 mm See-through sapphire glass back 82650 Calibre IWC-manufactured movement Automatic, self-winding 60 hours Power Reserve
