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This seems like a good opportunity to clarify something.The chrome knob did not use the lock nut as used on the Hurst T-handle. I regularly see a lock nut under the knob, even on cars going through judging.
Probably a flip. Has a shopping list of issues.
Just throwing this out there, what about a drop of Locktite, ?
I know they never came with a jam nut BUT...Chevrolet discontinued the Chrome Ball very early as I tried to get one in the early '80's and they were already discontinued by then. The last iteration they sold was a crappy black plastic version smaller than the original and they looked like they belonged on a kids toy. The repro looks pretty good but the threads are no way as good as GM. You need the lock nut just to keep it screwed on.