The most beautiful and scarce form of American coinage are proof issues. These highest quality coins feature double-struck frosted engravings contrasted with mirror backgrounds. The U.S. Mint does not sell these elusive proofs individually. Instead, collectors and dealers must break up existing proof sets in order to acquire these specimens on their own as they are necessary to fill complete sets of any series. To help complete your collections, we are offering both the 2019 Native American "Space Program" dollar and the Kennedy half dollar in this desirable grade.