The Dutch foundation Bunkerbehoud has restored a cupola, the mounting mechanism, aiming circle and the periscope. The bunker in Flushing can be visited in the summer every sunday afternoon. Here are some pictures.
Fully operational in a bunker type 143, an artillery observation bunker.
The aiming circle is present and working properly.
Here the cable for the counter weight mechanism.
Looking over the Scheldt estuary in 2006.