This creates sharp, high-relief designs against brilliant mirrorlike surfaces, and Proofs from the prestigious San Francisco Mint represent the finest examples of minting art. Each Proof is struck at least twice, at slow speed and with extra pressure. The blanks are hand fed into a specially adapted coin press. Proofs are made in limited quantities with specially buffed and polished dies and coin blanks. The term 'Proof' refers to how the coin is made вЂ“ not its condition. Proof Sets contain special versions of each coin denomination and design issued by the U.S.

The highest-quality US coins come presented as official mint-sealed Proof Sets. When Presidential dollars debuted in 2007, new folder packaging was introduced that contains coin specifications and allows a clear view of the obverse, reverse and edge inscriptions. Packaged especially for collectors, these handsome Uncirculated Mint Sets are issued in strictly limited quantities.ДЇrom 1965-2006, US Mint Sets were issued in traditional Pliofilm packaging, with each mint's coins sonically sealed in protective pockets. Issued since 1947, US Mint Sets contain one coin of each denomination from every mint that struck them for circulation (coins in US Mint Sets are typically from the Philadelphia and Denver Mints, though some years include special coins from the San Francisco or West Point Mints).

Pieces 1982 box set