2012 American Eagle San Francisco Two-Coin Silver Proof Set EG1.
"The United States Mint has a tradition of offering special limited-edition coin sets to American Eagle Coin collectors. The American Eagle Silver and Gold Programs, launched in 1986, are among the United States Mint�s most popular. The 2012 American Eagle San Francisco Two-Coin Silver Proof Set is an exquisite collection that captures the essence and beauty of these cherished coins. This set -- one American Eagle Silver Proof Coin and one American Eagle Silver Reverse Proof Coin minted at the United States Mint at San Francisco -- is a testament to the fine, exacting craftsmanship that has been a United States Mint hallmark since 1792.
A special feature of this elegant two-coin set is the coin featuring a �reverse proof� finish. Reversing the mirror-like background finish of a traditional proof coin and applying it to the design elements of the coin achieves a magnificent contrast." - Description and image directly from usmint.gov