L-1
The "Royal" Brisfit B-1 (became L-1 in May 1923) at the "Meeting du printemps" organised at Evere on June 4th and 5th, 1921. As was the custom at that time the aircraft wore a "Meeting number" in this case "10".
Belgian Wings
Belgian Air Force, past and present.
The Aeronautical Reference Site - De Luchtvaart Referentie Site - Le site référence de l'Aéronautique