IWC Schaffhausen Portofino Chronograph

The IWC Portofino Chronograph, reference IW391021, is a chronograph with a 42 mm case in 18-carat 5N gold. The case has a thickness of 13.6 mm. Self-winding calibre 75320 has a 44-hour power reserve, 25 jewels and 240 components. The grey dial has a day and date display and small hacking seconds beneath convex sapphire glass with antireflective coating on both sides. A water-resistance rating of 30 metres applies to the case. The movement runs at 28,800 vibrations per hour. The watch has a dark brown alligator leather strap measuring 20 mm wide.