SOUTH AFRICA 1967 (MNH) 12½C PROTEA CYLINDER BLOCKS, RSA WATERMARK
12½c Protea cylinder 224–223–222A and 224–223–222B blocks x 4, redrawn design, black-green background, perf 14 x 14, chalk-surfaced paper, RSA sideways watermark. Fresh and fine. Mint never hinged. SG247; SC322; SACC241b
