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<p>[QUOTE=&quot;coppercoins, post: 566095, member: 152&quot;]Actually this isn&#039;t machine doubling at all, and I would disagree that it is die deterioration doubling as well.</p><p><br /></p><p>It is not, however, a collectible form of doubling.&nbsp; It does have to do with die wear, but die deterioration doubling is a more extreme doubling caused around the edge of the design and whatever devices reside there.&nbsp; It is caused by the chipping away of the die surface, which raises &#039;humps&#039; on the outside edges of the devices.&nbsp; Think about the 1955 &#039;poor mans&#039; double, and you have die deterioration in mind.</p><p><br /></p><p>This anomaly only occurs on zinc cents, and its cause is not completely agreed upon by all who study anomolous coins.&nbsp; It is known, however, that this effect is very common and does not warrant any premium value.[/QUOTE]</p><p><br /></p>

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