70 C. Postal stamp orange with overprint "fortress Lorient" as corner margin piece lower left with sheet number "84944", variety "inverted overprint", perfectly mint never hinged, corner margin with the as usual traces of use in the margin through sheet cover, issued only 300 examples - of it only a few with inverted overprint - as corner margin piece with sheet number and variety "inverted overprint" probably the only one exists! Photo expertize Lothar Herbst VP (2017) : "the condition of the stamp is perfect. "