400 silver coins, it actually created two different versions: Proof and Brilliant Uncirculated. When the United States Mint in San Francisco struck the. People are looking at their collections and noticing differences?.There are Silver coins mixed in! Was it meant to be a secret? Probably not, but with so few made, it easily can be slated that no one knew about it until now.
Over 100 million coins were made, but only a fraction (less than 3 %) were made out of silver!
