Shane, I freely admit most of what I say can be looked at as speculation or guess-tamation. Since there are no employees still at the casinos from way back to talk with who ordered or received the tokens or bars. And the actual mints will not give out any information as that is secret between them and their clients.

Lets for fun take the 10 ounce silver bar from the Dunes casino (pic below). The casino opened 5-23-1955 and closed 10-23-1993. But, 5-23-1980 the casino came out with a 10 ounce silver Anniversary bar. Now lets think back in time a bit. Lets remember the Hunt Brothers and 1980 the silver run up. (Chart below). Silver in October when these bars came out was melting at close to silver melt of today, $24.00 - $25.00. That's a head scratch-er indeed. So in Bill Cohenour's guide he has the mintage as 200. Where he got that information no one knows and when he was alive he never answered those types of questions from me on a number of mintage entries he made. But lets go with that. If that month 200 were minted and given or sold to the public. How many were quickly turned in for silver melt. And then with a couple more over the decades of big silver melt downs. Along with a lot of coin or pawn shops buy these sort of things for a bit less than melt and just flip them for a quick return to the melting pots. If in fact 200 were minted my guess is more than half of that number no longer exist. And 200 of something like this I feel is a large number since they would have cost the casino what maybe $275 each unless they were ordered many months earlier then they could have gotten the at a lesser cost. Staying with the casino costs say of $250 each. That was a lot of money back in 1980 to be as a give away item or even in the gift shop.

I have no actual facts. Only piecing the puzzle together as best I can, and all for fun.

Enjoy.