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<p>[QUOTE=&quot;mikediamond, post: 46417, member: 1859&quot;]This is not mechanical doubling, but a peculiar form of incuse doubling related to die fatigue (die wear, die deterioration).&nbsp; The raised ring just inside the rim is a symptom of die fatigue that appears almost exclusivey on zinc cents.&nbsp; You often see incuse doubling of the outermost digits and letters where they intersect the raised ring.&nbsp; The last cent shown for comparison shows yet another kind of doubling on the mintmark caused by splitting of the copper plating.&nbsp; This is also not mechanical doubling.&nbsp; Both forms of doubling seen here are common and carry no premium, even if they don&#039;t have an official designation.[/QUOTE]</p><p><br /></p>

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