Souvenir sheets issue Karl Marx, all 4 souvenir sheets complete on four large-sized registered First Day Cover from "BURGSTÄDT (SACHS) a 24.10.53" respectively "10.12.53" to Pforzheim with arrival postmarks, souvenir sheet 8 A tear in the left sheet margin, the rest in perfect condition, as first day covers extreme rare block set, photo expertize Mayer BPP "it is First-Day-Covers. The souvenir sheets and the stamp are genuine. ", Michel 2.400.-