An unidentified class 644 DMU approaches Köln Hbf as leading unit of RB
11844 (Köln Hansaring - Marienheide) on 23 March 2005.
<p>
Digital photo by
<a href="http://www-users.rwth-aachen.de/christoph.schmitz2/index.html">Christoph
Schmitz</a>
(<a href="mailto:christoph.schmitz2@post.rwth-aachen.de">christoph.schmitz2@post.rwth-aachen.de</a>)