This is a genuine 2004 United States Mint Silver Proof Set. Unlike standard clad proof sets, this “Red Box” edition features coins struck on planchets consisting of 90% silver and 10% copper. Mint Mark: “S” (San Francisco Mint). Silver Content: Includes the 90% Silver State Quarters (Michigan, Florida, Texas, Iowa, and Wisconsin), the 90% Silver Kennedy Half Dollar, and the 90% Silver Roosevelt Dime. Additional Coins: Includes the Lincoln Cent, the two “Westward Journey” Nickel designs (Peace Medal and Keelboat), and the Sacagawea Golden Dollar. Condition: Coins are in deep cameo proof condition, housed in their original protective lenses. Packaging: Comes with the original red decorative outer box and the official Certificate of Authenticity (COA) from the U.