China. (French Indo-China). 1937. French Indo-China Air Mail postal stationery envelope 36c red endorsed 'Sous Inspector de la Garde Indigene' cancelled by circular 'Brigade de Indigene de Ninh-Binh/ Poste de Phu-Nho-Quan' on reverse and Phu Nho Quan/ Tonkin date stamp '8th Avril 37' addressed to France, routed via Hanoi and Marseille with Mavilly arrival. Superb.