Ordered by Hitler in 1936, designed by F. Pörsche, designed by Bela Barenyi, the first post-war Beetle appeared in 1949 and was powered by a 1,131 cm3 developing 25 hp. Technical development will take the form of repeated increases in engine capacity, with the aim of finding the horses which are sorely lacking: 1,192 cm3 and 30 hp in 1954, then 34 horses in 1960. other engines appear successively. : 1,285 cm3 and 40 hp in 1965, 1,493 cm3 and 44 hp in 1966, and finally 1,584 cm3 and 50 hp in 1972. From an aesthetic point of view, successive remodels will attempt to modernize the line by giving it volumes, while maintaining the look. To determine the vintages of a Beetle, just take a look at certain details. For example, models before 1953 have a rear window in two parts called "split window" in English or "pretzel" in German. The models from 1953 to 1958 have an oval rear window, then the following models are equipped with a rectangular window whose size will increase.