The product is a 2004-S United States Silver Proof Set containing 11 coins. The set is uncirculated, struck as proof, with a fineness of 0.9 silver in 7 of the 11 coins. Produced by the U. Mint in San Francisco, the set comes with a Certificate of Authenticity. These sets are a valuable addition to any coin collection, showcasing the craftsmanship and quality of American coins, especially the quarters from 2004.. The silver content in this set is 1.3375 oz of 90% silver. With the price of silver still on the rise this could be a very good investment at this price.. Please see photos for details.