The Saab 91 Safir first flew in November 1945, designed as a combined trainer and touring aircraft with a metal fuselage and retractable landing gear — advanced for its class at the time. From autumn 1952, the Swedish Air Force began replacing the Sk 25 with the Safir as its primary basic trainer, designated Sk 50. Pilots have long considered it one of the finest trainers the Air Force ever operated, and it remained in that role until 1971, when the Sk 61 Bulldog took over.

This example, individual number 50006, is a Sk 50B — part of the original three-seat batch built under license in the Netherlands by De Schelde, one of 74 delivered to the Air Force from 1952. It carries F15's markings, with the code "83".