I just bought my first tractor last month at an auction. The paper work said it was a 1940 9N but the serial number is 9NBN 105621. I'm not sure what I have but it seems to me it's probably a 43' 2N but I don't know about the BN part, I can't seem to find out any information about it any help would be greatly appreciated. It runs really good and everything works as it should and I have been having a lot of fun with it. We bought 5 acres of woods last year and I'm going to use it to help clear some of the land and make firewood for personal use.