Looking for Year of Mnaufacture

I just purchased this gator which is supposed to be a 2008 model. It is rough but runs good. Data platen rear of gator is gone. Found number by battery which I think is the S/N. I had to make some guesses but here it is: The number is WQ4XZ(or2)3Do43485 I think. Any help would be greatly appreciated.
Thank You For
Your Time