We have only ever seen this very distinctive looking loco on this train and line.
On this occasion it is pictured going through Bottrop-Boy on the 12th April 2005. 
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Photo from James & Martin's Picture Collection Copyright 'Jampics' m.hawkes7@ntlworld.com 
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British and Foreign Railway Pictures <A HREF="http://jampics.fotopic.net/"> Jampics Fotopic.</a>