O. K. Start over here. Can you post the complete specification number (top line) and the complete serial number including the last 3 digits (518 or 519). Also behins the starter are 3 casting numbers on the engine block. How about posting those as well. As far as the orange paint, there are couple of options. A lot of Oliver tractors had an Orange or yelowish primer paint under the green paint. I would get the numbers I asked for and then contact the Museum in Charles City and for a small fee they can tell you when the tractor was built and how it was equipped. I will get the museum information for you later today if no one else does.