GREAT BRITAIN 1975 (MNH) 6½P GREENISH BLUE CYLINDER 4 BLOCK, PVA
6½p Greenish Blue bottom left corner cylinder 4 (phosphor 18) block x 6, centre phosphor band, fluorescent coated paper, PVA gum. Very scarce. Not to be confused with common issue on PVAD gum. Fresh and fine. Mint never hinged. SGX872; SGU150; SCMH60
