25 Pfg dark orange with dark blue overprint "C. I. S", variety "inverted overprint", in perfect condition mint never hinged with manufactured paper unevenness, issued only 100 piece, photo expertize Gruber BPP: ". . . Large Schleswig rarity. The stamp is genuine and in perfect quality. ", Michel only unused with 1.300.- Euro listed, mint never hinged unquoted!