The set, contains proof versions of the commemorative quarters honoring America the Beautiful National Parks. Each quarter is struck in lustrous 90 percent silver.
Proof coins are produced at the United States Mint at San Francisco, using specially prepared, highly polished dies. Specially treated coin blanks are struck multiple times to ensure the finest detail in a frosted cameo image on a brilliant, mirror–like background. The coins–each bearing the “S” mint mark for San Francisco–are sealed in a protective lens and accompanied by a Certificate of Authenticity .
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