The Swedish Air force was also one of the many users of the Spitfire, using it from 1948 until 1955 as a reconnaissance plane with no armament, to fly missions over the Soviet Union and neighboring countries. The S.31 as the Swedes called it, was actually a Pr.XIX version which is the last reconnaissance version the RAF used. These were bought from the RAF as they considered them to be obsolete by the end of Second World War.