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<p>[QUOTE=&quot;Hookman, post: 3692243, member: 99642&quot;]I doubt it. Polishing is meant to take lines out. Polishing certainly wouldn&#039;t add anything like this.</p><p>You&#039;re probably much closer to the truth when you mention &quot;old die&quot;.</p><p><br /></p><p>Dies wear out. As they wear, they can cause what&#039;s known as DDD or Die Deterioration Doubling.</p><p>The old die can spread and it can also become flatter. Either way, when the old die strikes the planchet, the hot metal expands and squeezes out from under the die, causing what appears to be doubling. This is common and carries no extra value because that is not how true &quot;doubling&quot; occurs.</p><p>This kind of doubling is known as &quot;worthless doubling&quot;. Other forms of doubling are strike doubling and machine doubling.&nbsp; You&#039;ll see other members use the initials MD for machine doubling. This happens when something on the stamping machine is loose and allows the die to move slightly causing MD. Again, this is common and has no extra value.</p><p><br /></p><p>I&#039;m going to provide a link that has lots of info on it, in fact, just about everything about doubling. </p><p><br /></p><p>Choose a topic from the list on the upper left and start reading. Probably start with &quot;Worthless Doubling&quot; so you won&#039;t be wasting your time in the future.</p><p><br /></p><p>But read as much as you can, even all of it eventually. You will be amazed at the info available and how it helps you to understand the minting process.</p><p><br /></p><p><a href="http://doubleddie.com/58222.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://doubleddie.com/58222.html" rel="nofollow">Wexler&#039;s Coins and Die Varieties</a>[/QUOTE]</p><p><br /></p>

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