The 1991 Proof Set from the U.S. Mint includes a collection of Proof and uncirculated coins with denominations ranging from 1 cent to 50 cents. The set features coins composed of copper-plated zinc and copper-nickel, struck in proof quality at the San Francisco Mint. Each coin is certified by the U.S. Mint and comes with an Official Government Packaged Certificate of Authenticity (OGP COA). This set is a valuable addition to any coin collector's portfolio, offering coins in pristine condition with a guarantee of authenticity. This is the complete collection for that years, grab these soon, this will go fast.