SOUTH AFRICA 1970 (MNH) 12½C PROTEA CYLINDER BLOCKS, PHOSPHOR FRAME
12½c Protea cylinder 409–410–411A and 409–410–411B blocks x 4, perf 14 x 14, Swiss paper (fluorescent front only), 3 mm phosphor frame, RSA tête-bêche watermark. Scarce. Fresh and fine. Mint never hinged. SG294; SC338var; SACC299
