FT-11
As of 1953, the units of Kleine Brogel's 10th Wing used a number of T-33A's advanced trainers. As such FT-11/E can be seen at this base in the mid-fifties.
Belgian Wings
Belgian Air Force, past and present.
The Aeronautical Reference Site - De Luchtvaart Referentie Site - Le site référence de l'Aéronautique