1854. 6d. Dull lilac. Wmk. Inverted & reversed. Very fresh unused o.g. block of four. With clear to large margins on three sides and just touched at lower left. Light diagonal crease at upper left and two pinholes in centre. Probably from being pinned in a proof book or ledger. Nevertheless a handsome multiple of the highest rarity with only a handful of blocks surviving in private hands. (c.140000£). (Image)