Serbia. 1915. Picture post card from Belgrade of the 'New Casserne' addressed to France cancelled by military cachet 'Escadrille M.F.S./ Le Commandant' in violet with Lyon arrival in May 1915. Scarce item from the French Serbian Air Force M.F.S 99 in World War One.
The Serbian Escadrille (Air Force) had only 7 working planes due to the Air Supremacy of the 'K.U.K. Luftrahrtruppen' over Serbian sky's the French Escadrille M.F.S. 99 arrived in March 1915.