Great Britain Postage due airmail cover from South Africa, SGD14,D16Great Britain 1934 Postage Due airmail cover from South Africa, SGD14, D16. Very fine air mail cover from South Africa bearing a 6d green & orange (SG47) cancelled by a Hammarsdale Rail circular date stamp with a Johannesburg circular date stamp alongside for MY. 18. 1934. "Insufficiently Prepaid" handstamp at left, with a "T 80 Centimes" and a "8d F. B." handstamp denoting the amount due. Addressed to Oxford St. London, the 8d collected with a 5d