IWC, IWC Portuguese collection, model: IW500705, automatic winding, stainless steel, case diameter: 42.3MM Signature design: The 42.3mm stainless steel case is paired with a silver-white dial and features a classic off-center layout: a small seconds sub-dial at 9 o 'clock, a 7-day power reserve display with red scales at 3 o 'clock, and a date window at 6 o 'clock. The overall design is elegant and grand, with extremely high recognition. • Movement and Performance: Equipped with the IWC self-produced Cal.51011 automatic winding movement, featuring the Billerton winding system, it has a power reserve of up to 7 days (168 hours) and a frequency of 21,600 vibrations per hour. It is one of the few long-power movements in dress watches of the same price range.