MF-75 was the designation used in Bulgaria, East Germany, Romania and Czechoslovakia to refer to MiG-21MF aircraft delivered with cockpit instrumentation identical to that in the MiG-21bis with -75 refering to the year in which this type entered production. This example served with the Czechoslovak AF from July, 1975 until retirement from the Czech Republic AF in September, 1993. The frame now resides stored/preserved behind the Staré Aerovka museum at Letňany.