At this point four heavy bunkers were to be constructed. Just two finally became reallity. One of these two was probably demolished after the war.
The bunker which was not demolished was a commandpost (Befehlstand) of the kind 610, with registration-number 6530.
This German drawing shows
the bunker. (sorry for the low quality)
....
.............,..............
On the left the steel
door between the two parts of the bunker.