1916 Greece Serbia French Military Airmail Cover
Greece: 1916 (10 December). French military cover with its contents exempt from postage to Paris struck by Tresor et Postes 502 for Salonica and ‘Service Aeronautique Armees Serbes * Commandant du Parc *‘ violet handcachet. It seems that the Serbian Air Force was still serviced and supported by the French. Signed and confirmed by sender diagonally on lower left with manuscript. Ex. W. Robertson.