“The Amphicar was a German vehicle manufactured 1960-1968. It was the first commercially produced amphibious car and used a Triumph Herald engine over the rear axle to power the wheels and twin propellers. In the water, the front wheels acted as rudders. The body was steel.” – Source.

Source: “Start of the Sydney-Hobart Yacht Race” (1971) by Unknown – State Library of New South Wales, public domain.