South Africa - Belgian Congo. (Under Cover Mail). 1942. Air Mail envelope addressed to 'Madam Cassant, B.P. 62, Elisabethville, Belgian Congo' bearing South Africa SG 91, 3d blue and SG 95, 1s brown tied by Durban date stamp with bilingual 'Opened by Censor' label tied by censor cachet and Elisabethville arrival on reverse. Very fine.