PROM (712.002) tunnel profile measuring DMU, seen in Berlin-Lichtenberg in February 1999.

Photo and scan by <A HREF="http://www-optik.physik.tu-berlin.de/nink.html">Tobias Nink</A> (<A HREF="mailto:nink@physik.tu-berlin.de">nink@physik.tu-berlin.de</A>)