Sorry for the vagueness. Let me explain ... recently a chip was advertised on Ebay as an R-9 chip. I own one, I know another collector who owns one, and there is one pictured here on the Chip Board. Am I to assume that that accounts for four of the 4-7 "known" chips ????? Since I see this chip for sale somewhat frequently on Ebay, I suspect there are several others (if not many). Just thought it would be interesting to see if, through this forum, a more accurate number could be determined. I happen to be interested only in Vegas chips, but recognize there are many other interests. Hope that clarifies my earlier post.