This model is the initial production type of M4A3, and carries 75mm tank gun.

A front armor plate is not flat and the hatch portion has projected it.
In order to add spare Caterpillar and a wheel to a front armor plate, 
the plate was made inside-out and attached.

The gasoline engine is carried.
Please note that a radiator is in the rear back and there is a red cooling fan.

A wheel carries out movable according to the unevenness of the ground.