20+10 Pfg memorial Ravensbrück, vertical strip of four with right lower corner of the sheet and horizontal pair with left upper corner of the sheet (reverse) on properly franked special delivery register distance letter with special cancel \"FÜRSTENBERG (HAVEL) 17.9.59\" to Hamburg with arrival postmark, well perforated, a value small glueing creases, otherwise in perfect condition, scarce porto exactly large multiple franking