Zf871. This detailed map dated July 2, 1940 is interesting as it overlays the old and new location of the South System and gives an overall view of the whole complex. (map courtesy of armyjunk).
Zf871. This detailed map dated July 2, 1940 is interesting as it overlays the old and new location of the South System and gives an overall view of the whole complex. (map courtesy of armyjunk).