Wow!!!
That panel with the fuse and the switch sure looks like it was designed to hold a meter. All meter bases I've seen in Europe have this arrangement of three holes with sliding nuts that adjust to different sizes of meters. The fuse looks like a strange version of good old Diazed, and the switch almost lloks like an oldfashioned circuit breaker!
That flat stuff looks like GDR NIZAY cable. The Western version is NYIF or YM-STEG, which have an inner insulation on the wires and copper instead of alum. However, here it was never legal to use it mounted to the surface, only buried in plaster. The switches look old-fashioned but familiar.
