"The Collectors Guide to Nevada Casino Promotional Tokens with Priceguide" shows 4 different ones from the Coin Castle, and three different ones from the Money Tree (Reno) (it doesn't show the Money Tree that you have in the center).

All of the tokens show a "book value" of $2-$3...book was published in 1993

The book doesn't show any kind of issue dates, but I'd think that it's a case of reorders or even different manufacturers.