French China. 1942. Illustrated envelope addressed to 'Saigon, Cochinchina' headed 'Delegation Pour La Zone Libre/ 42 Rue St Ferreol/ Marseille' bearing Yvert 517, 1f50 brown tied by Marseille roller '17th June 42' with framed instructional 'Retour a L'Envoyeur/ Courrier pour l'Indochine limite aux/ Cartes Postales Non Recommandees' on face. Very scarce instructional. See Desrousseaux on the Japanese Occupation of Indo-China.