IWC Schaffhausen Portofino Chronograph

The IWC Schaffhausen Portofino Chronograph, reference IW391036, has a 42 mm stainless steel case measuring 13.6 mm thick. A convex sapphire crystal with antireflective coating on both sides covers the blue dial. The self-winding calibre 75320 provides 44 hours of power reserve. The chronograph records hours, minutes and seconds, while the dial also shows small seconds, the date and the weekday. The movement runs at 28,800 vibrations per hour and uses 25 jewels across 240 components. IWC rates the watch to 30 metres. A black alligator leather strap is fitted at the 20 mm lugs.