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<p>[QUOTE=&quot;Oldhoopster, post: 3992255, member: 84179&quot;]A Doubled Die occurs during the die making process as the working hub is slightly misaligned during one or more of the multiple pressings needed to make a working die (the mint now uses a single press process)</p><p><br /></p><p>The appearance of multiple mintmarks is known as a repunched mintmark (RPM) and is caused when the mint technician misaligns the punch as the mm&nbsp; is added by hand to the die.&nbsp; Since 1989, the mint makes the die with the mm in place so RPMs are no longer possible.</p><p><br /></p><p>Another trick, is if you see doubling on <u>both</u> the date AND mm on coins prior to 1989, it is almost always due to mechanical or deterioration doubling and not a true doubled die[/QUOTE]</p><p><br /></p>

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