SOUTH AFRICA 1970 (MNH) 10C CASTLE ENTRANCE CYL BLOCKS, PHOS FRAME
10c Castle Entrance cylinder 254–253A and 254–253B blocks x 4, redrawn design, perf 14 x 14, Swiss paper (fluorescent front only), 5 mm phosphor frame, RSA tête-bêche watermark. Scarce. Fresh and fine. Mint never hinged. SG293; SC337var; SACC298
