35 Pfg Germania with overprint \"Gdansk and overprint bar\", four values with different coloured overprints in the colours red, green, dark blue and black, unused with original gumming, very scarce set, the stamp with the red overprint expertized Seifert, photo expertize Gruber BPP (2016) : \"it is very scarce overprint samples. The stamps are genuine and in perfect quality. \" - by Michel in this kind not listed, as set probably unique opportunity to acquire!