GREAT BRITAIN 1973 (MNH) 20P OLIVE-GREEN PLATE 52A BLOCK
20p Olive-Green large format Machin definitive, Bradbury's paper, plate 52A block x 4. Fresh and fine. Mint never hinged. SG830; SGUC7
Note: Post Office paper was originally used before the introduction of whiter Bradbury's paper from 30 November 1973
