B-dozer - Metal Mechanical Construction Kit
 
The B-Dozer is a small, wind-up mechanical model of a bulldozer with an on/off switch for each track as well as a speed regulator.
 
It features a removable bucket and an opening hood. The model can move up to approximately 2.5 meters.
 
The B-Dozer has four levers. The central start/stop lever starts the engine. Two larger levers engage and disengage each of the tracks. Disengaging both tracks leaves the bulldozer stationary and the engine idling. A final lever on the side near the seat controls the speed. This allows you to change the model's speed.
 
When designing the model, we took into account the difficulties we had with the Marvel Tank model and created a completely different mechanism with a different type of track to allow for adjusting track tension.