During WW2, NSU produced a small series of toy models of the NSU Kettenkrad. The narrative is, that these toy models were given as a Christmas gift to the children of factory workers, who were drafted to the Wehrmacht.
The model is rough 30 cm (12") long and made from strong sheet metal. It weighs
around 1.3 kg (nearly 3 lbs). It is a simplified toy model and not an exact scale
model.
It has never had tracks. The wheels are designed in a very smart way:
Only the front wheel and the wheels of the last axle stay on the
ground and bear the load. So it is
very smooth and easy to push and steer the model on the floor.
I'm the proud owner of the model shown above. It is in excellent condition, only the right half of the handlebars is broken off.