What say you now?I'd say judging by the fact that all the lug nuts all all 3 wheels are in the exact same spot, and no visible drive lines, or suspension linkage for the axles. Thats is not a real truck.
But I could be wrong.
Here is a tracked vehicle such as in the previously shown models U411 and U421. The conversion was made by Fima Schidt in St. Blaise, the tank was placed on the platform. Basic model was a U406. The pictures were taken from 1968