GREAT BRITAIN 1962 (MLH) NATIONAL PRODUCTIVITY YEAR PHOSPHOR CYLINDER BLOCKS
National Productivity Year phosphor cylinder blocks x 6 (5 items): 2½d (1D–1B and 1D.–1B.), 3d (2D–2B and 2D.–2B.), 1s3d (3C–3B–3E). The 2½d with gum stain affecting one stamp otherwise fine. Mint lightly hinged. SG631p-633p; SC387p-389p
