China. (French Indo-China). 1940. Air Mail envelope addressed to Oran, Algeria bearing Indo-China SG 192, 50c brown tied by Yen-Bay/Tonkin date stamp routed via Hanoi with 'Controle Postal/ Militaire' censor label and oval 'Ouvert/Par/L' Autorite Militaire' cachet with instructional 'Par Avion Jusqui/Destination' with Oran receiver on reverse.