4, 50 Fr. postal stamp with red and black violet overprint "fortress Lorient", corner margin lower left with empty space and date of printing (overprints additional on the margin of sheet), on gum side right in the perforation a hardly noticeable small little brown spots, as well a brown spot in the lower margin of sheet, margins angerennt and with hinge reinforced, - otherwise in perfect condition unused, unique, photo expertize Lothar autumn VP (2018) : "the other condition is perfect. Stamps with empty space and date of printing are only approximate one possible. So far is me only this pieces recorded, therefore becomes it seeming highly probable to be unique. Extreme scarce rarity! " - one of the large rarities German occupation II. world war!