SOUTH AFRICA 1971 (MNH) 9C PROTEA CYLINDER BLOCKS, PHOSPHOR FRAME
9c Protea cylinder 409–410–422A and 409–410–422B blocks x 4, perf 14 x 14, Harrison paper (fluorescent front and back), 3 mm phosphor frame, RSA tête-bêche watermark. Fresh and fine. Mint never hinged. SG292; SC336; SACC297
