Posthorn 1951, 6 ++ Z ++ x ++ 10 Pfg, horizontal se-tenant with lower margin and HAN "10274.51 2", in perfect condition mint never hinged, unsigned, unfolded and very well perforated, superb in every respect (choice copy), photo expertize A. Schlegel BPP (2019) ". Mint never hinged. The se-tenant is genuine and has original gum. The quality is perfect. "