Does the part extending up from the hub in your photos have jaws like a brace (as in, for auger bits)? If so, this was designed to bore large holes by being braced against something*, with the ratchet unthreading from the opposite side - that is, the tool getting longer as the ratchet worked. I am presently blanking on the term for the tool. Still in use in the early 20th century, before drill motors became powerful and affordable enough to replace them.
If that's what it is, and you're not interested, I might be if we can figure out cheap enough shipping and a reasonable price.
*Mechanics would set up a 4x4 or larger, supported properly, to brace the tool against. The 4x4 was known as an "old man," implying that old men are good for nothing but standing around. If I ever become an old man, instead of being a large child of 66, I might be insulted.