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Just off the top of my head, it looks like you have the rare ones for the 76-78's. They only came on FJ55s. That's pretty cool unobtanium. Does the dial say "Asco"?
I don't think they will work with later parts, but I've not tried that and could be wrong.
I would think that you could sell those when the time comes and buy the more standard later hubs.
I had 3 of those hubs at one time that I have misplaced and have not seen in several years.