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<p>[QUOTE=&quot;Kasia, post: 1445465, member: 31533&quot;]Just because a <b><i>dime</i></b> made prior to 1980 doesn&#039;t have a mint mark, doesn&#039;t make it rare. Philadelphia did not place the mint mark on their circulation issues then. You could tell which mint it was made at because the Denver Mint used a D, and the Philly mint did not use one at all. When dimes were also made in <b><i>Proof</i></b> issues, they were made in San Francisco, and had the S mint mark. It is very rare that the <i>S Proof</i> dimes can be found without the mint mark. <i>That</i> is the rarity. 1975 was the first year (in recent history) where that mint was used exclusively for proof mintage. This was still in an era where mintmarks were punched individually onto the dies, and they got their dies shipped from Philadelphia without the mintmarks on them (as did Denver, but if Denver missed a circulation mintmark, you can&#039;t tell the difference from a Philadelphia minted one - however, proof issues are able to be differentiated from a circulation strike). So it was possible for a hand punched mintmark to be missed when doing the dies, or they may have had a late replacement or shipment, and it was someone&#039;s Monday morning and they didn&#039;t pay attention to it that day. Possibly, when it was discovered, they not only pulled the die, but also tried to cull all those coins. Having that type of process usually cannot get &quot;all&quot; errors out, which is why one or more may have slipped by. </p><p><br /></p><p><br /></p><p><br /></p><p>Also, in 1982, about 10 or 15,000 dimes were minted without a mint mark at Philadelphia. It was an error on the mint&#039;s part, in using two dies (I believe it&#039;s limited to two dies) that did not have the mint mark placed on it prior to use. They found their error and pulled the dies, but a number of coins made it to circulation. Those dimes are worth more than most clad dimes, but not in the range of the 1975 no mint mark proof that was found. An article about the 1982 ones is here: <a href="http://www.pcgs.com/Articles/Detail/7204/?utm_source=ezine&amp;utm_medium=email&amp;utm_campaign=ezine04102012" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.pcgs.com/Articles/Detail/7204/?utm_source=ezine&amp;utm_medium=email&amp;utm_campaign=ezine04102012" rel="nofollow">http://www.pcgs.com/Articles/Detail/7204/?utm_source=ezine&amp;utm_medium=email&amp;utm_campaign=ezine04102012</a>.[/QUOTE]</p><p><br /></p>

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