@redthunder – any one in particular, or all of them? Actually, they’re all pretty cool; my best mate lives on what used to be the family farm, (they still own one ten acre field they rent out), but his dad used to have an actual Caterpillar track.layer, he reckons it was nearly twice the size of those two little Internationals!
He still regrets his dad getting rid of it.
The military one is a 1943 M4 High-speed artillery tractor – 18 tons, can do 35mph. Underneath is a shortened Sherman track system. The gun is a 1943 90mm Anti-aircraft gun, made by Chevrolet.
I shudder to think what the fuel bills are like for the tractor and the Sherman.