1840, Mulready Envelope 1d. black, a complete unused sheet of 12, forme 4, stereos A172 (upper left) to A189 (bottom right), some folds as can be expected, but in a very fresh state of preservation. Rare, most of the sheets found in The Dublin Find have later been cut, only a few complete sheets of 12 are still preserved intact. Karl Louis BPP certificate (2025) (SG GBP 5.500)
