Greece. (French Photographic Detachment in Salonique). 1917. Stampless military mail envelope headed 'F.M., addressed to Paris endorsed 'Photo Aviation/ Arme d'Orient 502' cancelled by 'Tresor et Postes/ 502' date stamp with 'Parc D'Aviation Armee D'Orient/ Service de Vaguemestre' double ring in violet with adjacent 'Armee Francaise D'Orient/ Photographie Aerienne/ Le Captaine Commandant' with negaticves inside of Bulgarian P.O.W. and the French Aeronautique Base at Salonique with planes.
Very rare item from the Photographic Unit Base at Salonique.