50 C. "iris" in the horizontal gutter pair each with overprint "fortress Lorient", variety "overprint inverted", unused with strayer thus not fresh causing gum, perforations compressed, issued only 1800 piece, of it only 180 with blank field possible also in turn hereof only a small proportion as gutter which ever still are known, with inverted overprint extremely rare, photo expertize Lothar Herbst VP "the other condition is perfect. "