423 197-3 heads an S 12 service from Au(Sieg) to Düren, seen at
the Posthof junction in Cologne (between Trimbornstraße and Deutz) on 13
March 2010.
<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>)