Hersfelder Eisenbahn-Gesellschaft, V320 prototype with a freight train.
The V320 was once the most powerful diesel-hydraulic locomotive of the 
world. As the DB didn't need such big diesel locomotives, the prototype
went to the HEG and later to the Teutoburger Wald-Eisenbahn.
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Photo from MicroVision Photo-CD Picture-Show 21. Copyright TRONIC-Verlag.