80 C. postal stamp green with overprint "fortress Lorient" with left attaching likewise overprinted blank field, in perfect condition mint never hinged, with blank field are only approximate 30 piece possible, expertized Tust BPP and photo expertize Lothar autumn VP (2016) : "the condition is perfect. Due to the small edition from only 300 pieces are these stamps very rare. Stamps with blank field are only approximate 30 piece possible and are therefore especially rare. ", Michel 2.200.-