BPAEA 1957 (VARIETY) R5/5S CAERNARVON CASTLE BLOCK WITH RE-ENTRY
R5/5s Caernarvon Castle block x 8 with re-entry, showing doubling of the diadem and surrounding background lines, affecting the stamp at column 1, row 8. Scarce. Fresh and fine. Mint never hinged. SG57var; SC64var