IWC Schaffhausen Portofino Chronograph

The IWC Portofino Chronograph, reference IW391029, is a chronograph with a 42 mm steel case. The case measures 13.6 mm thick; self-winding calibre 79320 has a 44-hour power reserve, 25 jewels and 240 components. The black dial has a day and date display and small hacking seconds under convex sapphire glass with antireflective coating on both sides. The case carries a water-resistance rating of 30 metres. The movement has Côtes de Genève and perlage decoration. The movement runs at 28,800 vibrations per hour. A black alligator leather strap measures 20 mm wide.