1986 Mitsubishi Debonair - S10 From 1977, Open Design, founded by Aldo Sessano, became one of Mitsubishi Design's regular consultants. Over the years, Sessano's firm has submitted for the Japanese manufacturer a cohesive line-up remarkably implemented on the whole range: the Colt/Mirage in 1978, the Lancer EX in 1979 and the Galant/Sigma/Eterna Mk4 in 1980. For the design of the future Debonair (S10) to be launched in 1986, Sessano continues to unroll his thread and presented in 1979 this first full-size model, assembled by Fissore.