This 2001 Smithsonian American Buffalo 2 Coin Set Silver Dollar Proof is a must-have for any collector. The coins are made of 0.900 silver with a total precious metal content of 2 ozt. The set includes two coins and comes with a box and a Certificate of Authenticity. The coins are ungraded and have not been certified. The strike type is proof and the composition is silver. The coins were minted by the U.S. Mint in the United States. The set is a great addition to any collection and is a perfect way to invest in silver.