20 on 24 Pfg five year plan 1954 watermarked German Demokratic Republik (East Germany) and posthorn in type I, original stamp in offset printing, long distance cover the 1. weight step from Leipzig BPA . . . 7.54 to Thale in the Harz, cover with center fold, expertized Rehn BPP and new photo expertize Schönherr VP (2018) : "the stamp is obviously perfect, . . . . ", Michel - .