The NWB chip Im not sure of but looks a lot like the NB chips and could be they just used the same die for both chips but from different clubs, but it is interesting the NB stands for Norvil and Bill Bailey and NWB could be Norvil and William Bailey, still unknown and could be or not ? I'll give it up to the experts to see if they can come up with anything on this chips being it from here or elsewhere.Just uncanny how similar they are??? I'm not trying to push the issue just fascinated by the similarity. If interested in any chips any reasonable offer will be accepted. The Primadonna's are .25c Grey 4 red sm crwn. the other is $5 Tan 4 rose sm crwn. The Confucius Club Chips are extremely Rare and only a few have been seen and I haven't seen any more since I acquired these. I would give them an R-9 in Rarity. Very nice set and beautiful set for any collector looking for Iconic Chips with the interest and history such as these, same as the Primadonna's and New China $100 a stunning example of such a chip in the historic archives with it's fascinating history of Ruby Roberts the Keno Queen, and actual winner of a Contest pictured on the chip. And what can be said about the Place Club roulette's that we all don't know all ready, maybe the most beautiful chips ever made, how many crest and seal do you know have 5 different colors and such extremely detailed artwork of such a great pic of our Native American History,Wow doesn't get much better than this, except maybe if your a Las Vegas collector and see the Sahara and Sands first issue the Holy Grail chips, which I would compare some of these To.Please leave a comment question suggestion pci poke offer etc, Torrey