According to Alfa Romeo, the Type 412 was intended to replace the 8C 2900. The Second World War prevented the development of the 4.5-liter (72 cm x 92 cm). And after the war, Formula 1 (1,500cc) took priority for Alfa Romeo. In 1949, Daetwyler acquired one of the few roadworthy 412s with a box frame, independent front suspension, swing axle at the rear and hydraulic drum brakes. The car, built in 1939, was only able to remain race-ready thanks to the great skill of the legendary mechanic Bruno Picco from Zurich. Daetwyler and his Alfa Romeo were practically unbeatable in both national and international races between 1949 and 1954. This also aroused the envy of many of his opponents. The fact that the Alfa Romeo had hardly any serious competition in Switzerland - its actual horsepower figure was always a subject of speculation - did not prevent Daetwyler from always getting the maximum out of the super racing sports car. Day wins and track records were his goal, not the humiliation of his opponents. Unbelievable but true. In 1953, Willy Peter Daetwyler - now with a twin supercharger - set the same lap time on the Bern Grand Prix circuit as Raymond Sommer in a Formula 2 Ferrari in 1950. (152.880 km/h). The car, which was re-bodied in 1953 based on an idea by designer Michelotti, has been preserved and is now quietly dozing away in the "Musée National de l'Automobile Mulhouse".