1961 Chevrolet Impala
The Impala was restyled on the existing GM B platform for 1961. The new body styling was more trim and boxy than the 1958–60 models. Sport Coupe models featured a "bubbleback" roof line style for '61, and a unique model, the 2-door pillared sedan, was available for 1961 only. It was rarely ordered and a scarce collectible today. The rare Super Sport (SS) option debuted for 1961. This was also the last year the top station wagon model would bear the Nomad name.
Source: Wikipedia, 2011