50 Pfennig Germania with red overprint Danzig, "Kleiner Innendienst" (Small Internal Service), overprint error IIa "overprint bar broken off in the lower right corner and strongly elongated in the middle, (Plate 3, Field 61)", mint never hinged with original gum, flawless condition, photo certificate Gunnar Gruber BPP "genuine and flawless", Michel 600.-