Spitfire SM520 was built by Vickers Armstrong at their Castle Bromwich factory in 1944 as a single seat Mark H.F.IXe high level fighter and delivered to the RAF on 23 November of that year. With the war in Europe coming to an end she was placed in storage until 1948 when she was sold to the South African Air Force.

After a major flying incident, SM520 was scrapped but was saved and went into private ownership. Later she was converted to a two-seater.