I'm sorry I don't have a pic to post at the moment, but look for TC123 cast into the clevis. I believe this stood for 'tractor clevis' for 1-2 or 3 furrow plows. A heavier version was available for 90/99 series tractors and larger plows. I have seen them on ebay (not cheap) and I have 2 (one never used) but I won't part with any. (sorry) lol
 Hope this helps some
                                   Murray