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<p>[QUOTE=&quot;jallengomez, post: 827735, member: 19748&quot;]I think you might be thinking of doubled dies prior to 1990.&nbsp; Since the MM was punched onto the existing die by hand, any hub doubling on the die would not effect the mint mark and thus you would never see a doubled mint mark that was caused by a doubled die.&nbsp; Again, prior to 1990 that is.&nbsp; However, mechanical types of doubling can show on any or all devices of the coin.[/QUOTE]</p><p><br /></p>

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