Complete set, IWC Pilot, Model: IW378001 Automatic Mechanical men's watch Complete Set, extended, 43mm case diameter, date display, day display, chronograph function. Case: Made of 43mm stainless steel, it features the signature onion-shaped crown and chronograph pushers. The left anti-magnetic soft iron inner case design effectively resists magnetic field interference. The dial features a matte black dial with white Arabic numeral hour markers and luminous hands. At 3 o 'clock, there is a dual calendar window for the day and date. At 12 o 'clock, 6 o 'clock, and 9 o 'clock, there are hour, minute, and second counters respectively. The overall layout is clear and convenient for reading the time. Strap: Black cowhide strap, with a stainless steel pin buckle. It can also be replaced with a rubber strap to suit different wearing scenarios.