It looks like a 200 series but could be T102 with the wide front end. Apparently they sold a kit for that. I have a 200 series and a T102 and the model and serial number (for the T102) is printed on a metal type sticker that is on the little tool box below the seat. worst case scenario you can date the tractor thru the Briggs engine. Panzertractors.com has a link for that. It looks like it may have had a mower under it. I think they made a rotary mower for them, that would be a heck of a find.
Thanks for the information!
I wish I knew about the metal tag in the toolbox while I was visiting the tractor. However, the toolbox seemed to be a waterbath for rust. I didn't see a Briggs tag on the engine, and a cursory glance of the shroud didn't reveal a stamped code.
He said he did remember using it to mow the yard, but he doesn't know if the deck is existent or not. He mentioned a sickle bar and a cultivator/plow, but he didn't know where they were, either.