Erwin Komenda and Ferdinand "Ferry" Porsche designed the Porsche 356 very much on the principles that together they had designed the Volkswagen Beetle. The first Porsche 356 was produced in 1948 and many of its mechanical components came from Volkswagen or were based on those designs. Take up of the 356 was slow, with only Germany and Austria being the official market, and only 50 cars sold in the first 2 years. Markets expanded, and with owners keen to use the car in motorsport the 356 grew a reputation and sales expanded. The first engine was an 1086cc boxer four engine, mid-mounted but soon to become rear-mounted; the tubular chassis of the first few cars quickly being replaced by floorpan and body just like the Beetle. Engine sizes increased, 1286cc in 1951, 1290cc in 1953, 1488cc in 1952, smaller-engined cars often remaining in production for racing at the same time as larger engines. In 1954 American importer Max Hoffman asked for a Porsche speedster to be built with a low windscreen (removable) that would be suitable for the Californian sun; this model continued until 1958 when a full convertible replaced it. From 1956 the Porsche 356A was given a one-piece windscreen, and double overhead cam engines (1498cc then 1588cc) were offered. In 1960 the third generation Porsche 356B gained more glass, higher bumpers, and powerup to 90bhp (Super 90) or 115bhp. The final 356C was offered in 1964, and the engine is being used in the 904 racer. Production ends in 1966 as the 6-cylinder 911 takes over, but the 4-cylinder engine is brought back for the Porsche 912.