C55c 2nd Lt Edmond Thieffry.  Signed.Prince Antoine de Ligne. WW11 Pilot 

21 1 1978 Florennes postmark on Belgium Stamp. 2nd Lt Edmond Thieffry. Flown in Mirage Jet 

Personally  Signed.Prince Antoine de Ligne. He escaped from occupied Belgium  in February 1943 to join the Royal Air Force . He did his initial training in England as a sergeant  and then went to Canada for advanced training. In December 1944 he was appointed a 2nd Lt. in the Belgian Air Force and joined No 329 Sqn in 1945 to fly Spitfires. also signed by Major Aviateur Hubens the  Mirage Flight Pilot  on the covers. Certified Cover No 1059 of 996 Details enclosed. . 

The Cover   is in very good condition