IWC, Portuguese series, model: IW344203, automatic winding, stainless steel, case diameter: With a diameter of 42.4mm, this wristwatch is equipped with an extraordinary perpetual calendar function that can automatically identify different days of months and leap years. It can be easily adjusted through the crown, decoding the laws of the universe with intelligent imagination. The silver dial layout is harmonious, providing a power reserve of 60 hours and a condition of 98 new.