There are many different series of $2 tokens.
From Nevada, Aladdin and Harrah's Reno (Seven Wonders); Edgewater Laughlin (11 Wonders).
From Colorado, Teller House and Generic with a World globe as the logo ( Seven Man-Made Wonders and Seven Natural Wonders).
Grand Generic (Seven Wonders, several varieties including coin-aligned and medal-aligned. as well as 1994 and 1995 series).
Deadwood (Seven Wonders -dated 1994 and 1995, four Cars, five Motorcycles).

I won't bore you with the details of reeded, partially reeded, non-reeded and, belive it or not, thick reeded and thin reeded).

Christie and I have listed the non-Nevada series in our "Guide to Non-Nevada Strikes".