30 C. Postal stamp red in the horizontal pair with overprint \"fortress Lorient\" on each stamp, this by of the left stamp inverted = overprint tete-beche pair, impeccable mint never hinged without any signatures, issued only 600 piece, photo expertize Lothar Herbst VP (2015) : \"the condition is perfect. Tete-beche pairs (tete-beche) are especially rare. \" provenance: collection Horst bolder (139. Dr. Reinhard Fischer auction)