According to the serial # reference, it is a 1947. In addition to this site, check out: http://3000toys.com/allis-chalmers/forum which is the "unofficial Allis" website. There is TONS of cool information there, including the serial # reference, pictures, etc. Between ytmag's Allis Forum and the other one I mentioned, there is NOTHING you can't find out about that tractor. Have fun, RC.