2 1/2 Pfg to 10 Mark postal stamps with overprint "C. I. S", used "Flensburg * 1 k 10.2.20 11-12 N", faultless condition - respectively 35 Pfg small tear in of the right lower corner, very rare set, photo expertize Gruber BPP: "genuine and otherwise in perfect quality. ", Michel 3.200.-