Ballast tamper of unknown company working between Horrem and Sindorf (on
Cologne-Aachen) on 29 August 2001. It appears to be a Plasser & Theurer
08-475 Unimat 4S.
<p>
Digital photo by
<a href="http://www-users.rwth-aachen.de/christoph.schmitz2/index.html">Christoph
Schmitz</a>