OK, so you're torn between armor and model railroading...

The guy on the far right must be the Fat controller

Dunkirk Logging Tractor?

Thanks for the info.

Part of the mechanism reminded me of a Shay loco but didn't know about the production of logging locos.

....and, yes, it it a very interesting piece of technology !

Here is a website containing drawings of a similar crawler-tractor mechanism:

http://www.practicalmachinist.com/vb/antique-machinery-history/ot-crawler-tractors-196276/index7.html

It's a Dunkirk Logging Tractor, built by Dunkirk Engineering of Dunkirk, New York. That should help with a search. They also built wheeled steam tractors and geared logging locomotives. But this one is just whacky enough to be interesting!

........now that is different.

Maybe add an interest in wood working?

Thanks for posting that photo.

I'll need to do a search for similar adaptations-though not yet sure how to search Google Images just yet.