A Phönix D.III impressed after performing in Stockholm after WWI. It was bought by the Swedes in April 1920 with another twenty pieces following in three months later. The original Hiero engines were replaced by the German six-cylinder BMW.IIIa by 136 kW between 1922-1923. Three aircraft were still in service at the time of that the Flygvapnet was established in July 1926, when they were given the designation J 1. The last aircraft conducted meteorological tests in 1936 and is now on display at this super museum.

The Phönix D.I / D.II / D.III was an Austro-Hungarian WWI fighter based on the Hansa-Brandenburg D.I. Only a few D.IIIs were completed before the end of the war. Sweden purchased 17 Phönix 222s. Ten more were built under licence by FVM at Malmen in 1925-1926. In 1926 the type received the J1 designation for a fighter, although it was by then used only as a trainer.