SOUTH AFRICA 1970 (MNH) 20C SECRETARY BIRD CYL BLOCKS, PHOSPHOR FRAME
20c Secretary Bird cylinder 406–407–408A and 406–407–408B blocks x 4, redrawn design, brown-orange background, perf 14 x 14, Swiss paper (fluorescent front only), 3 mm phosphor frame, RSA tête-bêche watermark. Scarce. Fresh and fine. Mint never hinged. SG296; SC340var; SACC301
