I carry with me a keyring. In it is what in my humble opinion is the only casino still utilzing a chip with as much history and "look and feel" of the old days. HArrahs Reno just recently stopped using the brass $1.00 when they pulled them from the craps tables. Now, i think this is the only place thats still using this

What is it??? How about a little guessing game. Here are the hints:

Hint 1) Mold: B.C. Willis Large Key
Hint 2) Coin Center
Hint 3) Mustard color

More hints to come if needed