I can't find my copy. The book discusses and shows pictures of many of the very early Nevada slot tokens. I know it's in the Club library, but I just need to look something up. It's called "Handbook for Gaming Token Collectors" and was published in 1994.

I asked this question in 2010, but I'm not confident that the answer regarding wear on one of them being the only difference. These were made for Horse shu Club in Jackpot, and probably both minted by Osborne in 1965. One is likely Goldine metal, or is gold plated. The other is a very sharp strike on a bare brass planchet. The only wear is a few bag or hopper marks; little or no surface wear. Both have reeded edge. Obverse and reverse are slightly different; one side has a pair of small horseshoe and two small diamond marks near the edge. The other side has neither of these.

If anyone can help with information from Don and Jean's book, or other information, I'd appreciate it.