1, 50 Fr. Postal stamp brown with overprint \"fortress Lorient\", block of four from left margin of sheet, the left upper stamp unused - the rest three values mint never hinged, the right lower stamp with variety \"double overprint\" as well additional overprint \"fortress Lorient\" centered on all fours stamps going, right perforation slightly irregular, issued only 1.800 pieces - of it only a few values in multiples, photo expertize Lothar Herbst VP (2016) : \"the other condition is perfect. \", in existing form unique!