Bird,
Your post got me to thinking. Wife has in her flower bed a metal handled version of Dad's old one. Currently it has a "hoe" attachment on it (basically a metal square with a cutting edge). As a kid I used, and I'm sure Dad did for many years used, this tool for his garden.
I recall ours had (and don't think we kept) a plow share that fit on it. We do have a "cultivator", which is about 5 large spoon sized diggers a coupla inches apart.
Were there other attachments for these, or was that it?
I know I spent a lot of hours pushing that thing with the cultivator through the garden rows, and tried to plow with it once, but that was a waste of time! If the dirt was absolutely bare and not too hard, it might work. But any grass and/or hard dirt and it wouldn't do much.
Over the years, our wheel developed some flat spots and wasn't very round, so the unit sorta hopped through the rows!
Have fun,
Ron