The "Bill of Rights 1791 to 1991 Coin" is a 1 troy ounce .999 pure silver round minted in the United States in 1991. This commemorative coin celebrates the bicentennial of the Bill of Rights, containing 1 oz of precious silver content. With a fineness of 0.999, this silver round is a valuable addition to any collection or investment portfolio, showcasing the craftsmanship and history of the United States.