AIRFIX NORTH AMERICAN F-51D MUSTANG™ mk.IV / p-51K mustang 1:48 Scheme 1: KM272 ‘Dooleybird’ 19 Squadron RAF 1945 Scheme 2: KH676/CV-A Flg Off A F Lane, 3 Squadron RAAF Cervia Italy, April 1945 As the North American Mustang was developed as a direct result of a British Air Ministry requirement, it is somehow fitting that the RAF and Commonwealth air forces used the aircraft extensively during WWII. The British designation for the later P-51D version was Mustang IV, with the Dallas built P-51K, which used a different Aeroproducts propeller, referred to as the Mustang IVa.