Thanks! That looks right. Searching on "DKW military motorcyle" shows a lot of examples.

http://www.motorcycles-motorbikes.com/picture/number952.asp

I remember seeing quirky DKW cars on the streets of Germany in the early 70s, but did not know (if you can trust Wikipedia) that DKW was at one point the biggest producer of motorcycles at the world.*

* that could mean they produced 36 out of 70, I suppose....