On April 23rd, a first delivery of 43 Mustangs was flown from Liverpool to Bromma Airfield in Stockholm by US ferry pilots. The flight encountered german Me 109s over the North Sea, and in the ensuing dogfight, at least one german fighter was downed. Another three Mustangs were ferried in on April 30th. The Mustangs were immediatly accepted by the Flygvapnet, rebaptized J26s (fighter type 26) and assigned to F16 in Uppsala.The Mustang was a great improvement for the Swedish air force, not only in terms of armament and performance, but it was also the first fighter with a really good radio, which was tactically significant. Some of them were fitted with AN/APS-13 antennas in the fin. This wasn't used in Sweden, but the antennas were left in place. As the desert filter wasn't needed for Swedish conditions, some aircraft got the perforated plate replaced by a blank one.Range and endurance was far more than needed, therefore external tanks were seldom used, and some were converted into transport containers, potentially air droppable with rescue equipment.In 1946, it was decided to equip another wing, F4 at froson, with Mustangs. A second contract was established for 90 fighters. The cost per fighter now being only $3,500 per aircraft, as the aircraft were not all in perfect condition, and the USA was now getting rid of all its wartime aircraft...They were flown from depots in Germany, via Bremen, to Såtenäs, where 30 arrived in November and December 1946. They were refurbished and put in service at Frösön starting in April 1947. The remaining 60 were put in temporary storage at Såtenäs and gradually put in service until August 1948.In 1948 a last batch of 21 Mustangs were purchased, and were put in service at F 16, the last one being accepted in March 1950.