BF 109G-5 "Walter Dahl" W.Nr.27112, 3. /JG 54, Russia, Dec 1943. The Bf is the designator for the Bayerische Flugzeugwerke (BFW) (Bavarian Aircraft Works) that produced the original aircraft. By the end of 1939 the Bf-109E (Emil) had replaced all other 109 variants and equipped 13 Gruppens with 40 aircraft each.