South Africa Postage Due 1969 4c Wmk RSA, Afrikaans at Top

POSTAGE DUES: 1969 4c deep myrtle-green & emerald, WATERMARK RSA, AFRIKAANS AT TOP (SG D62c). Superb M (barest trace prior hinge) lower marginal part-cylinder example. A rarity of the South African Postage Due issues. (cv£375). See additional image below.