4 Kc. Airplanes with overprint "swastika we are free! " with margin of sheet at the bottom, overprint type III, as well in the lower margin interesting blind embossed of the overprint, in perfect condition mint never hinged, extremely rare, issued only 200 piece, with the decorative variety especially attractive, expertized Beczek and new expertise Brunel VP (2018) "the stamp has authentic overprint. . . And mint never hinged original gumming. . . . The condition is perfect. ", by Michel unknown