I think that's a B Farmall. The rear tires are 9-24's IIRC? The seat is offset so you could look right down the row when cultivating.
I guess it was a step up from a team, probably could pull about the same.
I think you are right!
There was an old disk plow out in the pasture that was rusted down badly. I moved it to an erosion ditch at the owner's request. I was thinking how I'd have hated to plow that much ground with that old, lightweight disk...