SOUTH AFRICA 1972 (MNH) 10C CASTLE ENTRANCE CYL BLOCK, PHOSPHOR FRAME
10c Castle Entrance cylinder 471–470 block x 4, redrawn design, perf 14 x 14, Harrison paper (fluorescent front and back), 3 mm phosphor frame, RSA tête-bêche watermark. Fresh and fine. Mint never hinged. SG293; SC337var; SACC298a
