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<p>[QUOTE=&quot;Oldhoopster, post: 8047983, member: 84179&quot;]I would strongly suggest spending some time learning and understanding the minting process.&nbsp; The reason that members can say you your quarter isn&#039;t a D over P is they know the minting process.&nbsp; Starting in 1989, the mm was no longer punched into individual Working dies.&nbsp; There is no way for an over mint mark to occur.&nbsp; </p><p><br /></p><p>Here are some links to get you started (the YouTube is a US Mint video)</p><p><br /></p><p><a href="https://www.coinnews.net/2014/01/06/how-the-denver-mint-makes-dies-to-produce-coins/" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.coinnews.net/2014/01/06/how-the-denver-mint-makes-dies-to-produce-coins/" rel="nofollow">https://www.coinnews.net/2014/01/06/how-the-denver-mint-makes-dies-to-produce-coins/</a></p><p><br /></p><p><a href="https://m.youtube.com/watch?time_continue=104&amp;v=mqPvKxJXC_Y&amp;feature=emb_title" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://m.youtube.com/watch?time_continue=104&amp;v=mqPvKxJXC_Y&amp;feature=emb_title" rel="nofollow">https://m.youtube.com/watch?time_continue=104&amp;v=mqPvKxJXC_Y&amp;feature=emb_title</a></p><p><br /></p><p>You can also use the following sites for doubled dies.&nbsp; </p><p><br /></p><p><a href="http://Www.doubleddie.com" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://Www.doubleddie.com" rel="nofollow">Www.doubleddie.com</a></p><p><a href="http://Www.varietyvista.com" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://Www.varietyvista.com" rel="nofollow">Www.varietyvista.com</a></p><p><br /></p><p>Here are some characteristics of worthless doubling (mechanical and die deterioration) vs true doubling.&nbsp; You&#039;ll find significantly more worthless doubling than true doubling, so it helps to learn the characteristics of each.</p><p><br /></p><p><a href="https://www.doubleddie.com/144801.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.doubleddie.com/144801.html" rel="nofollow">https://www.doubleddie.com/144801.html</a>[/QUOTE]</p><p><br /></p>

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