This is # 37 see tractor and engine tag photo, We are the second owner. Original owner passed and daughter sold to us. We know of no modifications. It's original. We purchased July 2020. We love this machine! Only known issue is gas gauge doesn't work. We have some paperwork. Maybe able to get more from deal who is still in business. We are selling because just not enough room in shed and garage for it and all attachments. As you can see from manufacturer label the production number can not be read. Included in price is; tractor, mower deck, vacuum bagging attachment, snow blower (this blower is GREAT), 2 lawn airators (1 spike,1 punch hole), 1 tow behind spring rake, extra mower blades, extra belts, a trailer hitch, tractor lift, a few extra wheels and tires but honestly I don't think they go with this tractor, if you want them. As you can see the leather seat has some wear to be expected for 1234.2 hours but the hinges, cushion adjustment work fine. This tractor and attachments are truly as clean as they look.