50 Pfg. Plebiscite-Aufdruckausgabe in the vertical pair, lower stamp with and upper without overprint, mint never hinged, superb in every respect (choice copy), so far only well known pair of this stamp with this decoratively overprint variety, amongst other things signed A. Brun and certificate with photograph Gruber BPP: ". . . Se trata de a very large Upper Silesia rarity"!