171 001 of DBAG, used on the the line Blankenbug-Königshütte in the Harz. This line is electrified with 25 kV at 50 Hz, so only this type of locomotives can run there (and only there). This special locomotive was seen in Blankenburg station at May 13th, 1999 in a special green livery (Museum?).

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>)