Autobriefkasten am Bochumer Hauptbahnhof; hier Detailausschnitt
<a href="//commons.wikimedia.org/wiki/User:Marku1988" title="User:Marku1988">Marku1988</a>
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<a href="//commons.wikimedia.org/wiki/File:Bochum_Autobriefkasten_HBF.jpg" title="File:Bochum Autobriefkasten HBF.jpg">File:Bochum Autobriefkasten HBF.jpg</a>