SOUTH AFRICA 1972 (MNH) 20C SECRETARY BIRD CYL BLOCK, PHOSPHOR FRAME
20c Secretary Bird cylinder 474–473–472 block x 4, redrawn design, orange-buff background, perf 14 x 14, Harrison paper (fluorescent front and back), 3 mm phosphor frame, RSA tête-bêche watermark. Scarce. Fresh and fine. Mint never hinged. SG296a; SC340var; SACC301a
