2011 American Silver Eagle 1 oz. $1 BU The American Silver Eagle is the official silver bullion coin of the United States. It was first released by the United States Mint on November 24, 1986. It is struck only in the one-troy ounce size. The dollar is guaranteed to contain one troy ounce of 99.9% pure silver. l Its content, weight, and purity are certified by the United States Mint. The American Silver Eagle bullion coin may be used to fund Individual Retirement Account investments.[1]