Rare Antique Sheppard SD3 Diesel N/R

NO RESERVE auction for a RARE antique Sheppard SD3 diesel tractor. The tractor appears to be cast iron that has been hand painted.
The body of the tractor is a single piece of solid cast iron. The seat, the grill, the wheels, the steering wheel and even the flywheel (as pictured) are all cast iron. I don't know the manufacturer or the specific age of the tractor.
There are stickers with the name of the tractor on either side, however, those stickers may not be original to the tractor.
Please email, I will be more than happy to attempt to answer any questions that you may have.
Additional photos are available upon request.
Thanks for looking and