1963 Chevrolet Corvair Testudo
Nuccio Bertone presented the Testudo himself at the 1963 Geneva Motor Show.
It was a built as an alternative-body for the Chevrolet Corvair chassis.
It features a one-piece door/hatch that revealed the entire interior.
Another unique element was the headlights which were flush fitting, and popped-up when illuminated.
Info taken at supercars.net