I have a 9N and I am trying to figure out what the serial number is and what year my tractor is. I think it's a 42 9N but the serial number is hard to figure out. Seems to be 9NB√97062. The check mark seems to be to narrow to be another "N". This is the original block for this tractor which has been replaced because of a crack all the way down the side of the block. Thanks for any help.