Own a piece of American history with the 2020 S American Innovation $1 Proof Coin Set, officially graded NGC PF70 Ultra Cameo. This prestigious four-coin set features the First Day of Issue designation, guaranteeing these coins were received by NGC within the first 24 hours of release. Struck at the San Francisco Mint, each proof coin showcases immaculate surfaces and high-contrast mirrored fields, perfect for discerning numismatic collectors. This commemorative dollar series celebrates American ingenuity and inventors, making this certified set an essential addition to any high-grade modern collection.