Indochina, Donation Week, June 22nd, 1942, Michel Nr. IND 266; A single stamp with a 12C nominal plus 18C surcharge was issued in France. But the stamps did not reach Indochina due to disruption of transportation during the war. As a result very few of these stamps were postally used. Some of them were physically brought by travelers to Indochina during or after the war and then used there, mostly for philatelic purposes. All used stamps or postally used letters are pretty rare.
Here is the mint hinged stamp.
Mixed franking using the 20C Children Aid Organization and Donation Week stamps that were not issued locally together with stamps from the Air Mail and Domestic Scenes II sets paying an overall postage of 6.40P on a registered international air mail letters ent from Saigon to the United States in February of 1949. Two different New York arrival cancels on the reverse.
Registration Nr. 090350