Bottom Mounting Ring for Massey Ferguson Model 37, 39, 41, 46, and 78 Planters.
Planters had either a "flat drop" or "edge drop" seed hopper bottom. The mounting ring will fit either style of planter.
Picture number 4 shows the placement of the ring which is item # 7 in the parts breakdown.
Massey Ferguson planter ring part number 689114M1.