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<p>[QUOTE=&quot;desertgem, post: 1861164, member: 15199&quot;]MD is short for Mechanical Doubling ( other names also) where the die that struck the coin wasn&#039;t doubled itself, but the die was not perfectly fitted to the press and it moved a little as it struck the coin leaving a flattened shelf like layer. Since this is after the strike, it is considered to be damage by most and no value is increased by it. It is thousands of times more common than a coin struck by a die which was doubled in it&#039;s preparation.</p><p><br /></p><p>It is one of the more frustrating things to learn to tell for beginning searchers.[/QUOTE]</p><p><br /></p>

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