IWC Schaffhausen Portugieser Chronograph

The IWC Schaffhausen Portugieser Chronograph IW371620 is a chronograph in a 41 mm steel case. The case measures 13 mm thick, and water resistance is rated to 3 bar, equivalent to 30 metres. A convex sapphire crystal with antireflective coating on both sides covers the white dial. The self-winding calibre 69355 drives the watch, with 46 hours of power reserve. It combines a chronograph function with small seconds on the dial. A sapphire display back on the case reverse shows the movement. IWC specifies a blue rubber strap measuring 20 mm at the lugs.