IWC Portofino series, model: IW510103, manual winding, case: stainless steel, diameter 45mm, thickness 12.4mm • Movement: Manually wound Cal.51111, 8-day (192-hour) long power reserve, transparent back, with power reserve display • Dial: Off-white cream dial with Roman hour markers ◦ Upper left small plate: 8-day power remaining indicator The small dial below: Small seconds hand ◦ 3 o 'clock position: Date window • Strap: Original wine-red fishskin strap with steel pin buckle. 8-day perpetual power manual movement, IWC signature movement. The back cover is polished and highly ornamental, no need to wind it every day The white surface has a strong retro flavor and creates a great atmosphere for both business and formal wear. The dial has a high recognition rate, and the power reserve dial is the most distinctive feature of this model