The parts of the drawbar on my unstyled Model B look like this and I am told they are not correct.
If your Model B comes before serial number 42200, it would have been delivered with a "loop draw bar" as shown here. The advantage of a loop draw bar is that you can hitch up a plow without using a clevis (Find out more about that HERE). The disadvantage is, it is more difficult to hitch up an implement that only needs a single "pin" to hook it up. If you want to restore your early unstyled tractor the way it was originally, you should look for a loop drawbar. I believe reproductions are available from some of the parts suppliers.|