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<p>[QUOTE=&quot;Troodon, post: 139988, member: 4626&quot;]&quot;P&quot; for Philadelphia was used on the Jefferson nickels, on the reverse abonve Monticello, from 1942 to 1945 indicated they were the silver alloy.&nbsp; It was used again on the obverse from 1980 to the present.</p><p><br /></p><p>It was used on Roosevelt dimes, Washington quarters, and Kennedy half dollars from 1980 to the present.</p><p><br /></p><p>It was used on Susan B. Anthony dollars from 1979 to 1999, and on Sacagawea dollars from 2000 to the present.</p><p><br /></p><p>It was used on any commemoratives minted in Philadelphia from 1983 to the present.</p><p><br /></p><p>It was used on the proof American Silver Eagles from 1993 to 2005.&nbsp; (note that from 2000 to the present, uncirculated American silver Eagles without a mintmark were minted in West Point, not Philadelphia.).</p><p><br /></p><p>It was used on 1/10 oz., 1/4 oz, and 1/2 oz. proof American gold Eagles from 1988 to 1993.&nbsp; (It was not used on the 1 oz. American gold eagle, nor on any of the American platinum Eagles).</p><p><br /></p><p>Think that about covers &quot;P.&quot;</p><p><br /></p><p>Typically coins without a mintmark were minted in Philadelphia also; exceptions being American silver eagles from 2000 to the present (which were minted in West Point); dimes, quarters, and half dollars from 1965 to 1967 (which were minted in Philadelphia and Denver, with no mintmark for either), and the 1922 plain Lincoln cent (which was actually minted in Denver; the lack of a mintmark is an error).&nbsp; There were also a few Roosevelt dimes in the 70&#039;s minted in San Francisco that are missing the mintmark by error.[/QUOTE]</p><p><br /></p>

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