I dont know shit about this thing, and cant find anything on it either. German and before WWII if I had to guess. The Google translation of the one caption shown says: “caterpillars and tankers allow a user oberquerren of morasses , swamps and mountainous areas” So, no help there.

Also, on a personal note, when I loudly yell the phrase “ Sumpfen und gebirgigen gegenden”, I sound just like Hitler and the Dog doesn’t like it much.