The 2006 20th Anniversary Two-Coin Set is a special edition set of coins produced by the United States Mint to commemorate the 20th anniversary of the American Silver Eagle program. The set includes two coins, a one-ounce American Silver Eagle coin and a one-ounce American Gold Eagle coin. The Silver Eagle coin features the iconic Walking Liberty design created by Adolph A. Weinman, while the Gold Eagle coin features a design of a family of eagles created by Miley Busiek. Both coins have a face value and weight of one ounce, and are made of 99.9% pure silver and gold, respectively. The set was limited to a production run of 250,000 and comes with a certificate of authenticity from the United States Mint. The 2006 20th Anniversary Two-Coin Set is highly sought after by collectors and investors due to its limited mintage and the high quality of the coins included in the set. It is a great addition to any collection of American Silver Eagles or Gold Eagles, and is a valuable investment for those who appreciate the beauty and history of American coins.