South Africa. (Netherlands East Indies). 1937. Envelope addressed to Batavia, Netherlands East Indies bearing 'Anti-Tuberculosis Fund' 1d red and black (2) tied by Durban date stamp '30th Nov', underpaid with oval 'T/ 10c' hand-stamp and bearing Netherlands East Indies postage due SG D231, 10c Salmon tied by Batavia date stamp '27/12' on face. Charity stamps 'not valid'.