With great attention to detail, IWC has introduced a series of six historic timepieces: the Portofino, the Portuguese, the Pilot's watch, the Ingenieur, the Aquatimer, and the daring Da Vinci watch of 1969. Each of these retro IWC timepieces is presented in both stainless steel and limited edition platinum versions. Ticking inside each is an automatic or manually wound movement produced by IWC, each a showcase for exclusive watchmaking technology such as the Pellaton winding system, and the distinctive "Jones" fine adjustment index.