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 and marks came into the RAF's hands in various ways throughout the war, including captures by Allied ground troops, forced or mistaken landings by German pilots, and defections. They were then passed to the Air Fighting Development Unit where they were extensively tested before passing them on to the RAF's No. 1426 (Enemy Aircraft) Flight, nicknamed "the Rafwaffe" ("see main article for details of the six Bf 109's they operated"). Other Bf 109s captured and operated by the RAF and Commonwealth air forces included the following: Several Bf 109Es were captured intact by the French shortly after the outbreak of