Thank you for your reply. I remember seeing a picture of it and listed it in a parts book, like for a disc. They used a "Bruning" brand 3 piece coupler which was a center connecting sleeve with a male end on each end as pictured with this bracket in the late 1940s and early 1950s. The bracket was chained or hooked to the implement and then connected to the male end on the tractor. MM used the same ones as I got seals for the coupler sleeve through AC years ago. The original seals were two pieces and later changed to a single seal. Unfortunately agco doesnt have all parts books for the older equipment.