Clad & Silver Proof Quarters
San Francisco Mint
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Clad & Silver Proof QuartersSan Francisco Mint |
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Proof Quarter Sets
Sets offered on this page do not include an outer box or certificate. The quarters and the plastic holder encasing them have been taken from U.S. Mint proof sets that included additional coins and are identical to those in quarter (only) proof sets. |
What Are Proof Coins?Proof coins are made specifically for collectors. Polished dies, higher striking pressure and more careful handling are used to produce beautiful coins with extra sharp details, mirror-like fields and cameo devices.Since 1968, all proof quarters have been struck at the U.S. Mint facility in San Francisco and bear an 'S' mintmark. Commemorative proof quarters have been issued since 1999 both in copper-nickel clad and silver versions. The clad coins are a "sandwich" of 75 % copper, 25% nickel outer layers over an inner copper core, the same as quarters struck for circulation since 1965. The silver coins are 90% silver, 10% copper, the same as quarters struck for circulation prior to 1965. Each silver proof quarter contains 0.18 troy ounce of pure silver. |
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