IWC Portofino Chronograph Mens Watch IW391037With a clean and classic design, the IWC Portofino Chronograph 42mm Mens Watch IW391407 is the perfect everyday wearer. Featuring a stainless steel case that’s water resistant up to 30 metres, this gents chronograph watch is complete with stainless steel case with anti-reflective convex sapphire crystal glass. With an easy-read dial containing three sub dials; 60 second, 30 minute and 12 hour, the silver face has navy hands and indices. Presented on a navy blue alligator leather strap for a casual finish, the automatic self-winding Calibre 75320 delivers a 44-hour power reserve.