This 2017 S Limited Edition Silver Proof Set is a must-have for any coin collector. The set includes a stunning array of coins that are sure to impress. With a strike type of proof and a grade of ungraded, these coins are a great addition to any collection. The brand/mint is U. Mint and the certification is uncertified. This set is perfect for anyone who loves collecting coins and wants to add a unique piece to their collection.