UPDATE: Rudolf sent some additional pics of this rig. Steve gives a good analysis within the comments section.
Rudolf forwarded me this unusual CJ-?A/MB wagon. Rudolf reports that this is titled a 1944 and was used for public transit in Bali. Given the full floating rear end, the rearend might have been from a MB. It reminded me of another vehicle with a similar wood rear end that is located in France (see the red image below).
From France (CJ-3B Page, Offroadaction.ca)