The product is a 1981 U.S. Assay Office San Francisco 1 one troy ounce .999 silver round. This silver round has a fineness of 0.999 and contains 1 troy ounce of precious metal. It was minted in the United States and is a valuable addition to any collection of silver bullion or investment portfolio. Bonus: 2 grams valcambi suisse 0.999 fine silver included.