IWC Schaffhausen Portofino Chronograph

The IWC Portofino Chronograph, reference IW391007, is a chronograph with a 42 mm steel case. The case is 13.6 mm thick; self-winding calibre 75320 has a 44-hour power reserve, 25 jewels and 240 components. The silver-plated dial has a day and date display and small hacking seconds. A dark brown alligator leather strap is on the watch, 20 mm wide. The case's water-resistance rating is 30 metres. The movement runs at 28,800 vibrations per hour. The crystal is made from sapphire, with a convex shape and antireflective coating on both sides.