• KM Reference: KM#A202a. Struck at the San Francisco Mint for the 1997 U.S. Silver Proof Set. This coin is 90%. silver, 10% copper (not the standard clad proof issue), weighing 12.5 grams with. 3615.
• KM Reference: KM#A202a. Struck at the San Francisco Mint for the 1997 U.S. Silver Proof Set. This coin is 90%. silver, 10% copper (not the standard clad proof issue), weighing 12.5 grams with. 3615.