The Daimler MarienWagen - A WWI-era "tank" for your Post-Apoc Worlds.

This tank looks like a primitive Jawa sandcrawler to me. It was to be equipped with two machine guns, two 20mm cannon, and a flamethrower, but by the time it was ready to be tested the Germans had already realized it wasn't up to AFV status (it was more of an APC), and then they had a terrible test trial in which the vehicle tipped over (as it was obviously top heavy). None entered production.