I have recently found these two small pieces of equipment, a drill-plough ridger and cultivator/grubber, but has anyone any idea what piece of machinery its compatible with, or how they would have been attached, hitched, to that machine?
They could be early Merry Tiller ones, Early type C Merry Tillers had a fabricated hitch with a round hole, after about 1961 the Model D came along and they used a cast hitch with a rectangular hole, early round accessories would fit the Model D.