IWC, the Portofino series, model:IW391031, stainless steel dial, automatic mechanical date and day display chronograph, core parameters, diameter: 42mm, thickness: 13.6mm, suitable for most men's wrists. Movement: 75320 automatic mechanical chronograph movement, original from Switzerland Case: Made of stainless steel, polished, and paired with a black alligator leather strap Dial: Off-white (silver-white) dial with golden hour marker hands, featuring day, date and chronograph functions Waterproof: 30 meters of water resistance for daily life, meeting the needs of regular wearing Appearance and Positioning The design is simple and elegant, and it is the signature "formal commuting style" of IWC. The off-white dial and gold needle color combination is retro and grand, suitable for various occasions such as suits and casual wear.