Netherlands East Indies. (South Africa - Indonesia). 1950. Air Mail envelope addressed to Medan, Sumatra bearing South Africa SG 120, 1s brown and blue tied by Pretoria date stamp '23rd June 1950', underpaid with instructional 'Onvoldoende Gefranking/ Insufficiently Prepaid' in violet on face with octagonal 'T/ Centimes' hand-stamp and endorsed '21' bearing 'Dutch Rule Restored' postage due SG D493, 7 1/2c turquoise (2) mixed with 'United States of Indonesia postage due 'SG D576, 2 1/2c on 50c yellow (pair) applied and tied by Medan receiver on face. Attractive combination.
Ex Paul Bulterman's Indonesia postage due collection.