Check the listing for details. 1999-S United States Mint 9-Coin Proof Set OGP & COA. Listed at 9.75 USD. This 1999-S United States Mint 9-Coin Proof Set is a must-have for coin collectors and enthusiasts. The set includes nine coins that are all in excellent condition. Each coin is beautifully designed with intricate details that showcase the rich history and culture of the United States. This set is a key date and comes with its original government packaging (OGP) and certificate of authenticity (COA). The coins in this set are uncirculated and have not been graded. The set was struck at the San Francisco Mint location and is certified by the U.S. Mint. Don't miss out on the opportunity to add this rare and unique set to your collection. Multiple available. Outer Box may show minor wear. Over 6000 Positive Feedback - Buy With Confidence!! BE SURE TO CHECK OUT OUR OTHER LISTINGS!!