ISO John Deere 1520 gas. I am looking for one of my grandpas tractors. He traded it in to New Salem, ND John Deere in the late 70's for a new tractor and from there is history. If you have one or know of one I would appreciate any lead. I have the serial number. Condition does not matter. I would just really like to at least see it, if not, have a chance of getting it back to the family farm.