still in use commercially....

[tankbarrell]

Brent, almost impossible to say without a close look but the transmission is the late single piece which was not used on Grizzly. The tracks are T47 rubber chevron and these are features generally seen on 'standard' US production vehicles. It could be Sherman based or M7 Priest.

Of course, all those parts are interchangeable as assemblies so it could have started as a Grizzly and the steel CDP track and sprockets could have been changed to rubber for road use but it seems unlikely that the complete transmission assembly would also have been changed.

It could be Sexton based but it has Sherman bogies whereas most Sextons had specific bogies but again they could have been changed.

Because of that, it would need a close examination to determine its origins and that assumes enough original material is left to allow that!