GREAT BRITAIN 1962 (MNH) 10D PRUSSIAN BLUE CYLINDER 1 BLOCK, I/E, PHOSPHOR
10d Prussian Blue cylinder 1 block x 6 on whiter paper with two 9.5 mm phosphor bands (applied photogravure) reacting violet, perf type I/E. Some perf splitting otherwise fine. Mint never hinged. SG617d; SGS133; SC366p
