I have only seen one of the two bottom "plows" shown in the pics. A neighbor guy who flew in WWII had one in behind a B Deere. He had a 100 acre plot and would plant peas and plow them in just to have something to do. He was roughly 85 at the time and the second and third (his kids) generation on the farm.
Everything else of that nature was on a single beam and had at least 16 discs and the "offset" wheel and I vaguely remember a box of dirt.
Thinking back some 25 years ago as haven't seen any since and I was new to country living at the time, I think some had a massive cast offset wheel and I think some had a box of dirt and a much lighter weight wheel....the box supplying the weight to anchor the wheel.
I don't think the guy told me what it was, I just saw what it looked like and don't remember for sure if it had two "standards". I think it did as I remembered being able to see the concave surfaces of both discs in full form which would not have happened had they been on a common axle. His must have had the scrapers broken off or not supplied on whatever brand plow he had.
We referred to them as one ways because the soil was cut only one way as compared to tandem disc harrows that we use down here as plows and cultivators which cut the dirt both ways simultaneously.