SOUTH AFRICA 1973 (MNH) 20C SECRETARY BIRD CYL BLOCKS, NO WATERMARK
20c Secretary Bird cylinder 515–514–513A and 515–514–513B blocks x 4, redrawn design, orange-yellow background, perf 12½ x 12½, phosphorised paper, no watermark. Fresh and fine. Mint never hinged. SG322; SC383; SACC335
