M-Bahn-System (magnetic) was used in 80s until 1991 in Berlin-Centre. But with german reunification in 1990, the old west-east-metro line was reopend; M-Bahn using mostly the same track and being to small for the upcoming traffic west-east, was dead. One of the M-Bahn cars can now be seen in Nuremberg transport museum.
Foto/Scan: Lars Freund , October 1996.