French Legation in Serbia 1915 Registered Cover to Paris, bit worn envelope franked with Serbia 50p tied by Niche cds and with accompanying boxed bi-lingual black registry handstamp, two violet circular "Ministere de la Guerre/ Controle Postal Marseille" handstamps with same on back side (two strikes in violet or black), reverse side with large Belgrade legation wax seal alongside Niche despatch cds and a black boxed "Ouvert Par/ L'Autorite Militaire" handstamp, cover roughly opened at top and with some edge wear, Fine and unusual (Image)