You have to play a "Silver Strike" machine. They are special machines with the silver strikes loaded in a carousel and seems to me you have to play about $20.00 to "WIN" of them. If you win one the carousel turns and one of the strikes in a air tight drops into the coin tray. Be aware that most of them no longer contain silver or perhaps a small amount. But it is fun to win one of them if you collect silver strikes or tokens.

Good Luck.

Also, I think the El Cortez, the D and The Venetian may still have some silver strike machines.