5 Mark Germania with overprint "Gdansk", variety "inverted overprint", mint never hinged, very fine, photo expertize Gunnar Gruber BPP "the stamp is so far a unique piece and counts to the very large Gdansk rarities . in perfect quality" - it is no further copy in unused condition known, only used are for years two examples known! great rarity the Gdansk philately but also for Germania specialists a attractive piece!