Steve spotted this photo taken on September 10, 1968, in Encarnacion, Paraguay. Given the military tank, I was thinking this might be a M-606. However, this does have a PTO bar. Though it has “WILLYS” badges on the tailgate and hood, it appears these are actually a separate plate that’s been added. The rear seat looks like some kind of sideways seat.

PHOTO CREDIT: Alejandro Gomez, https://www.flickr.com/photos/alefot/10767607474/in/photostream/