The tractor is most likely an experimental unit. They have ended up in the hands of the public before, so it wouldn't be a surprise to find this one did.  

The information I had for the production tractors in the article was just that, units that were made during regular production. I would guess that there would still be a build card for your tractor that would tell us more about it. Give the Floyd County Museum a call at 641-228-1099 and let us know what you find out.