Saab Sk37E Viggen SE-DXO / 15-61 (cn 37809) is a two seat trainer version of the Swedish short-medium range jet fighter. On 24 February 1974 the aircraft was delivered to F7 ‘Skaraborgs flygflottilj’ Swedish Air Force and received the tactical code 61. In the second half of 1999 the aircraft was updated to Sk37E and delivered to F4 ‘Jämtlands Flygflottilj’ at Östersund-Frösön on 27 January 2000. The aircraft was coded F4-72. On 6 October 2005 the Viggen was transferred to the Swedish Air Force test unit, also known as Försökscentralen (FC). This unit is based at Linköping/Malmen.
The last flight with the Försökscentralen was on 26 June 2007 (callsign Viktor 09), when it landed at Vårdsberg and was handed over to Saab AB. The aircraft was stored for a longer period at Såtenäs until it was made airworthy again. It undertook its maiden return to flight on 15 May 2018 from the F 7 Wing at Såtenäs after having been approved by the authorities on 21 March 2018. The Viggen is painted in the unique four colour camouflage as all Viggens were painted from the late 1970s.