One of the reasons to include size when submitting to CG.

As far as I know there were 6 of these in 1995. None were drilled and none remained in shop.

If those 6 examples represent what was from one of the 4 wheels, how many wheels do we see on CG not counting the lunette series; if they were part of a series?

That's just part of how much we don't know and all else means nothing without proof...