The potato plow looks to be home made. It might be Ohio Steel, but I'm pretty sure it's Pap Built.
The Cultivators, the three point assembly is a retrofit but the rest is a Brinley Cultivator set.
I know pap retrofit the cultivators to work on the large frames, but used them on the tube frames before. Oddly - and the pictures don't show it - but I swear they look as if they were painted gold. It's hard to tell with all the rust/dust on them though. Suppose it could have been painted to match a demonstrator tractor at one point in time? I know they had a few over the years at Dye's tractor sales - per dad.
I thought about paying around with the potato plow once it dries up outside... after my experience with the disk today.. I think i'll give it another week or two before I dig out anymore implements lol. That HT20 sure knows how to throw the mud...I didn't even realize until I got in the house that I had a hug chunk stuck to the top of my hat! lol