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<p>[QUOTE=&quot;Carthago, post: 2456767, member: 76111&quot;]They&#039;re called control marks and were likely used by the mint for some type of production organization purpose.&nbsp; Some RR issues with control marks use a unique one for each die perhaps as a way of tracking the die inventory, some use the same one across many dies perhaps as a way to mark a certain lot of bullion that was used.&nbsp; There are several theories.[/QUOTE]</p><p><br /></p>

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