IWC Schaffhausen Portofino Chronograph

The IWC Portofino Chronograph, reference IW391030, 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. A mesh steel bracelet is on the watch. 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. The dial is covered by convex sapphire glass with antireflective coating on both sides.