These walk-around photos were taken at Flygvapenmuseum at Malmen outside Linköping in 2017 and 2019. They show a Saab A 21A-3, individual number 21364, coded Röd R — "Röd Rudolf" — and marked with the insignia of F 6 Karlsborg. It is one of the most unconventional combat aircraft ever to enter production anywhere in the world, built around a twin-boom pusher configuration that placed the engine behind the pilot and drove a rear-mounted propeller. This arrangement gave the pilot an exceptional forward view and allowed heavy armament to be concentrated in the nose, but it also created a potentially lethal problem: ejecting from the aircraft risked impact with the propeller. Saab solved this by equipping the 21 with one of the world's first production ejection seats, using an explosive charge to propel the pilot clear. The prototype first flew on 30 July 1943 and the type entered service in December 1945. Individual 21364 was built in 1948 as a J 21A-3 fighter and converted in 1950 to A 21A-3 standard — the dedicated attack variant equipped with underwing hardpoints for rockets and bombs as well as wingtip fuel tanks for extended range, both of which are visible on this aircraft. F 6 Karlsborg operated around 70 examples of the A 21, making it one of the most significant users of the type. Individual 21364 is preserved at Flygvapenmuseum in the attack colours it wore at Karlsborg.