The “Number One” had it all: it was a sports car for the road and the circuit, the giver and receiver of both everyday and racing technology. The pre-war Berlin-Rome car gave the inspiration for the aerodynamic shape of the Porsche Prototype 356 No. 1. At the same time, the 1948 Gmünd-Roadster was a rolling lab for the development of its successors. The technology transfer enjoyed a flying start at Porsche.