I looked it up in my Hunnicutt Stuart A History of the American Light Tank book and the closest thing I could find to this tank is the Combat Car M2. The US Cavalry had Combat Cars in the 1930s because Congress forbade them to have tanks; tanks were for Infantry support. The suspension is not correct, however, the US was experimenting with various types of suspensions at that time, and I suspect this is one of those experiments. This tank was used in the Bob Home movie, "Caught in the Draft." If anyone has any further data on this tank, post it in the comments.
A nice M60A1, one of my favorite tanks.
A late production M48 series tank. Note the tank shell on the fender and how large the cupola is on top of the turret.