I have seen the Joss west cues with that ring work too. It does have an ivory ferrule, which I doubt ving would use. A friend of mine had several Tad cues, so I will compare the tapers soon.
Also, the butt isn't a perfect straight taper. It starts at about 1.20 at the butt, the end of the wrap is at 1.15, then the forearm tapers significantly down to .850.
Thanks for all the comments so far.