Messerschmitt Bf 109 11 July 1938 when Erhard Milch finally allowed Willy Messerschmitt to acquire the company. All Messerschmitt aircraft that originated after that date, such as the Me 210, were to carry the "Me" designation. Despite regulations by the RLM, wartime documents from Messerschmitt AG, RLM and "Luftwaffe" loss and strength reports continued to use both designations, sometimes even on the same page. All extant airframes bear the official "Bf 109" designation on their identification plates, including the final K-4 models. The aircraft was often referred to by the folk-designation, 'Me 109', particularly by the Allies. The aircraft was often nicknamed "Messer"
Messerschmitt Bf 109 outstanding rate of climb was superior to many Allied adversaries including the P-51D Mustang, Spitfire Mk. XIV, and Hawker Tempest Mk. V. After the war, the 109 was built in Czechoslovakia, as the Avia S-99 and S-199, and in Spain as the Hispano Aviación Ha 1109 and 1112 Total Bf 109 production was 33,984 units; Wartime production (September 1939 to May 1945) was 30,573 units. Fighter production totalled 47% of all German aircraft production, and the Bf 109 accounted for 57% of all German fighter types produced. A total of 2,193 Bf 109 A–E was built prewar, from 1936 to