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 operational history aircraft). By November 1944 the 101. was re-organized into a fighter regiment, and was re-equipped with the latest Messerschmitt Bf 109 G-10 and G-14 types. At the end of December the pilots received new Bf 109s at Wiener-Neustadt and were subsequently transferred to the Kenyeri airfield. Early in February 101 Fighter Wing received 26 brand new Bf 109 G-10/U4s with the instructions that their engines had to be changed after 30–40 operating hours. However, combat missions against the 15th USAAF came to an end, and the 101st's main adversary in the air became the Red Air Force. The Hungarian pilots