Iwc: IW500704, Series: Portuguese Series, Movement type: Automatic mechanical Case diameter: 42.3 mm. Case material: stainless steel Dial layout: Silver-white radial dial with golden Arabic numeral hour markers ◦ Upper left small dial: 60-second seconds sub-dial ◦ Lower right small dial: 7-day power reserve display (red marked DAYS) A large calendar window at 6 o 'clock Strap: Black matte fish skin strap, stainless steel pin buckle Movement: Cal.52010 self-produced long power automatic movement, 7-day (168-hour) power reserve, transparent back design The classic dual-dial layout: The two main sub-dials and the large calendar are the most recognizable features of the Portuguese 7, exuding a retro business feel to the fullest The core advantage of the seven-day long power: It still runs normally after being fully wound and left to stand for 7 days. There is no need to frequently adjust the time when taking off the watch on weekends German movement finishing: fish-scale pattern on the balance wheel bridge, blue steel screws, polished chamfered, with a transparent back for strong ornamental value Light and thin formal wear fit: The case lines are neat and tidy, suitable for all kinds of suits and evening gowns, and can be used for both business and collection purposes