GREAT BRITAIN 1963 (MNH) 5S CAERNARVON CASTLE BLOCK SIGNED BY LYNTON LAMB
5s Caernarvon Castle plate 4 block x 4, printed by Bradbury Wilkinson on whiter paper with multiple crowns watermark, signed by stamp designer Lynton Lamb (1907–1977). Very scarce. Fresh and fine. Mint never hinged. SG596a; SC372var
