IWC Schaffhausen Portofino Chronograph

The IWC Portofino Chronograph, reference IW391036, is a chronograph with a 42 mm steel case. The case has a thickness of 13.6 mm. Calibre 75320 is self-winding and has a 44-hour power reserve, 25 jewels and 240 components. The blue dial has a day and date display and small hacking seconds beneath convex sapphire glass with antireflective coating on both sides. A black alligator leather strap is on the watch, 20 mm wide. A water-resistance rating of 30 metres applies to the case. The movement's operating frequency is 28,800 vibrations per hour.