Iwc Pilot Series, Model:IW378003, Automatic mechanical, transparent back movement, 43mm in diameter, stainless steel, blue dial, three-eye chronograph, day / date display, pin buckle, complete set Classic pilot design: 43mm stainless steel case paired with a deep blue dial, white luminous Arabic numeral hour markers and wide hands, complemented by the pilot's signature triangular 12 o 'clock logo, making it highly recognizable. Practical chronograph and movement configuration: Equipped with IWC's self-produced Cal.69385 automatic winding movement, featuring a classic column wheel design, it supports a 12-hour chronograph function, has a power reserve of approximately 46 hours, and is water-resistant to 100 meters. It is suitable for daily wear in scenarios such as hand washing and rain. Details plus points: At 3 o 'clock, there is a dual display window for the day of the week and date. At 6 o 'clock, there is a small seconds sub-dial with a red seconds hand, and it is paired with a cowhide strap with the same color stitching, catering to both sporty style and business casual scenarios.