IWC Schaffhausen Portofino Chronograph 39

The IWC Schaffhausen Portofino Chronograph 39, reference IW391406, is a chronograph with a 39 mm steel case. The case measures 12.7 mm thick and is rated to 30 metres of water resistance. A silver plated dial sits under a convex sapphire crystal with antireflective coating on both sides. The chronograph function covers minutes and seconds, with a small seconds display set into the dial. A self-winding movement, calibre 79350, drives the watch and holds a power reserve of 44 hours. IWC Schaffhausen fits the watch on a black alligator leather strap, 20 mm wide at the lugs.