SOUTH AFRICA 1971 (USED) 4C GROOT CONSTANTIA CYL BLOCKS, PHOS FRAME
4c Groot Constantia cylinder 420–418A and 420–418B blocks x 4, perf 14 x 14, Harrison paper (fluorescent front and back), 3 mm phosphor frame, RSA tête-bêche watermark, both on-piece with circular Pretoria Philatelic Services cancel dated 3 XI 71. Fine used. SG288; SC332; SACC293
