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<p>[QUOTE=&quot;Beefer518, post: 2805805, member: 87737&quot;]Machine doubling happens during the strike, and happens enough to almost be considered common. The coin before, and the coin after the machine doubled coin may or may not have machine doubling (most likely not). This is also called strike doubling.</p><p><br /></p><p>A DDR or DDO are not caused by the physical striking of the coin, but is when the &#039;image&#039; is cut into the die doubled. I don&#039;t know enough to say exactly how it happens, but it does. Every coin struck with that&nbsp; die will have the doubling.</p><p><br /></p><p>They are totally unrelated to each other, and one can not become the other.[/QUOTE]</p><p><br /></p>

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