GREAT BRITAIN 1973 (VARIETY) 3P ULTRAMARINE BLOCK, IMPERF BETWEEN STAMPS
3p Ultramarine right marginal block x 4, centre phosphor band, flourescent coated paper, gum arabic, type I (thin) value, with right vertical pair imperforate between. Very scarce. Fresh and fine. Mint never hinged. SGX856b; SGU107b; SCMH36var
Note: just one perforation hole exists on each side of affected rows
