1840, 1 P. Black, plate. 1 b, reprints, so-called "One penny Black", used with red Maltese Cross cancel, on all sides uniformly wide margins, faultless condition, very nice extremely fine copy of the first postage stamp of the world, expertized Pröschold BPP and photo expertize Louis BPP (2023) "genuine and in perfect state of preservation" (SG-No. 2 [Spec. AS5])