|The mystery gun / mortar.|
I bought this photo as part of a collection and all the others were clearly taken on the Eastern Front - being scenes in and around villages or men on the Steppe. This picture was the "odd man out" showing a busy urban rail yard. Due to the provenance, I assume the photo was taken in the East but cannot be sure.
The gun is a model that I have never identified. Perhaps a French or Soviet piece pressed into German service? I am not even certain if this is a weapon mounted upon a flat-bed wagon for transportation or a specialised piece of railway ordnance. If anyone has any ideas I would greatly appreciate your comments.