SOUTH AFRICA 1970 (MNH) 15C INDUSTRY CYLINDER BLOCKS, PHOSPHOR FRAME
15c Industry cylinder 298–297–296A and 298–297–296B blocks x 4, perf 14 x 14, Harrison paper (fluorescent front and back), 3 mm phosphor frame, RSA tête-bêche watermark. Fresh and fine. Mint never hinged. SG295; SC339var; SACC300
