Mint at the West Point Mint These coins Are struck at least twice, which gives the coin a frosted, sculpted foreground for a glamorous shine; defined, intricate design; and mirror-like background. Each coin bears the “W” mint mark reflecting its striking at the West Point Mint and is packaged in a Black satin-lined presentation case accompanied by a Certificate of Authenticity. Proof Coins Are the finest quality of coin produced by the United States Mint. The term "proof" refers to the coin's finish. Proof blanks are specially treated, hand-polished, and cleaned to ensure high-quality strikes. The blanks are then fed into presses fitted with specially polished dies and struck at least twice. The coins are then carefully packaged to showcase and preserve their exceptional finish.