Netherlands East Indies. (Postage Dues). 1937. Double post card addressed to Bandar Tnigi bearing SG 335, 1c slate-purple (block of four) tied by Medan date stamp, underpaid with 'T' hand-stamp and bearing Netherlands East Indies postage due SG D232, 12 1/2c salmon applied and tied by Tebingtinggi receiver '28th Oct 37' on face. Very ine.