IWC, Portugal, model: IW500114 Automatic Mechanical • Case: stainless steel, 42.3mm diameter, 14.1mm thickness, 30-meter water resistance for daily use, double-sided anti-reflective sapphire, transparent case back • Strap: Black fishskin strap with pin buckle • Movement: Self-produced Cal.51011 automatic movement, 42 jewels, 7-day (168-hour) power reserve, with stop-seconds function, Pellaton automatic winding system, Geneva wave finish on the plate • Dial: Silver-white dial with golden Arabic numeral hour markers; There are two secondary boards on the left and right: the small seconds board on the left and the 7-day power reserve display on the right, with a date window at 6 o 'clock. The classic design of the Portuguese Seven: One of the most popular dress watches in IWC, with a nautical style and a dual sub-dial layout that is highly recognizable. It has a 7-day long power supply. With a full chain, it can walk continuously for 7 days. Even if it is not worn for a long time, it is not easy to stop. The transparent back allows you to appreciate the polishing of IWC's classic in-house movements, giving it a strong presence when worn formally.