US Army Halftracks

This particular model M15 got a canvas cover over the driver compartment, but my other three don't have that, just for a little variety.

M15 40mm and M15 37mm, Roco Conversion and Filament Fighters.

The M15 37mm had a more open turret than the 40mm. 

The turrets needed more armor in the Pacific where the Japanese were likely to close assault armor.

The turrets are removable and it is easy to mix them up and they are not always exactly interchangeable.

So I note a small number on the bottom of the turret and on the top of the halftrack rear so that the same halftrack gets the same turret each time.