The product is a United States Mint 1999 American Eagle 1 oz. 999 Silver Proof Coin Box with a certificate of authenticity (COA). This coin features a stunning proof finish and contains 1 oz of. Produced by the United States Mint, this American Eagle coin is a popular collectible item for those interested in silver bullion coins. The coin comes in a box with a COA, making it a valuable addition to any coin collection.