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<p>[QUOTE=&quot;Troodon, post: 143091, member: 4626&quot;]Actually &quot;silver-clad&quot; refers to Kennedy halves minted from 1965 to 1970, as well as quarters, halves, Ike dollars minted for the Bicentennial uncirculated set in 1975 and 1976, and Ike dollars minted from 1971 to 1978 especially for collectors(Ikes made for circulation are copper-nickel clad).&nbsp; Silver-clad coins have a core that is 20% silver, 80% copper, with clad layers that are 80% silver, 20% copper.&nbsp; Overall they are 40% silver by weight.&nbsp; They haven&#039;t minted any silver clad coins since 1978; silver proof sets minted since 1992 and various commemoratives now minted are a solid alloy that is 90% silver, 10% copper, the same as was the standard for dimes, quarters, and half dollars prior to 1965.</p><p><br /></p><p>Most clad coins are copper-nickel clad; these have a core of pure copper with clad layers that are 75% copper, 25% nickel (overall they are about 92% copper, 8% nickel by weight).&nbsp; Dimes, quarters, and half dollars from 1965 to the present have this composition, as did Ike dollars from 1971 to 1978 and SBA dollars from 1979 to 1999.</p><p><br /></p><p>Sacagawea dollars are also clad; the have a pure copper core with clad layers of manganese brass, which is 77% copper, 12% zinc, 7% manganese, 4% nickel.</p><p><br /></p><p><br /></p><p>In answer to the original question... a 2006-S Kennedy proof would either be copper-nickel clad, made for normal clad proof sets, or made from a solid alloy of 90% silver, 10% copper, for the silver proof sets.&nbsp; Kennedy half dollars haven&#039;t been minted in silver clad since 1976.&nbsp; If the 2006-S is described as clad, it means it is the copper-nickel clad made for the standard proof sets as opposed to one made for the silver proof set.[/QUOTE]</p><p><br /></p>

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