The IWC Portofino 3513 is a timeless watch for the refined man, equipped with a self-winding movement. It was in production from the late 1980s to the early 2000s and came in either yellow gold or stainless steel with a 34mm case. Depending on the year it was made, it housed either a caliber 37521 or 30120 movement. The IW3513-15 model features a sleek stainless steel case and a handsome black military/pilot-style dial.