4 Fr. Postal stamp with overprint \"fortress Lorient\", variety \"double overprint\", in perfect condition mint never hinged, issued only 200 pieces - of it only a few with double overprint, unsigned, photo expertize Lothar Herbst (2010) : \"the condition is perfect. \", Michel 2.000.- seeming undervalued, if already the normal stamp 1.800.- appraises!