Found An Interesting Grouping!

[sheepherder]

Originally Posted by Norme

I don't think it's a portable radio...The mysterious device might well be a full-plate camera body with the lens removed.

...Or a signal lamp...

http://www.ebay.com/itm/ANTIQUE-WWII...-/230988515518

German WWII signal flashlight
This was general purpose model that proved very reliable and was used by the Wehrmacht during the war.

This one is labeled as WW II, but the appearance is similar...

Perhaps a signals battalion???