Old DR Signal (Hl-System), showing "Hp 0, Hl 13: STOP".
Seen in Berlin-Ahrensfelde in May 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>)