This is the SD (Super-Deformed) M4A3E8 Sherman Tank, painted in the ‘Rice’s Red Devils’ scheme. It’s a tank that actually existed during the Korean War. It seems that not just one, but multiple tanks from the unit were painted this way. However, they weren’t exactly identical – details like the number of teeth varied a bit. The painting of this model is based on the tank numbered C7. I also uploaded a photo taken together with another version.