I am not sure why you are telling him the serial numbers and year are irrelevent in the tractor world. Apperently, you don't know they are just as important as any other piece of equipment. Without the serial number, you can't find the correct parts if there was a running change made on the tractor that is only denoted by the serial number it was changed at. Also, in many older tractor brands, having the correct serial is the difference between a $1000 dollar tractor or a &75,000 tractor.