The IWC Portofino 3331 is a quartz-powered version of IWC’s classic dress watch. It was introduced in the late 1980’s and survived up to the early 2000’s.Reference IW3331-07 has a stainless steel case and a black carabou strap; it was also available with a brown caribou strap (IW3331-05) or with a black alligator strap (IW3331-06). The gold version carries the reference number 3331-03.
