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<p>[QUOTE=&quot;Conder101, post: 1592568, member: 66&quot;]The coin is placed in a blank disk with a hole the same size as the coin.&nbsp; Then the DISK is struck with a die that has a hole in the center.&nbsp; The hole in the die is either the same size as the hole in the disk or slightly smaller.&nbsp; The idea is that when the disk is struck the metal not only expands out against the surrounding collar but also expands inward to press against the coin.&nbsp; When the hole in the die is slightly smaller it also hits the edge of the coin.&nbsp; This can do two things.&nbsp; It can cause the edge of the coin to be flattened down over the edge of the disk, and it can cause the edge of the coin to buckle inward making the edge concave.&nbsp; The metal of the disk expands into this concavity effectively locking the the two pieces together.&nbsp; It is much harder to knock the coin out of the hole because the metal of the disk is effectively inside the edge of the coin.</p><p><br /></p><p>The jagged reeding is because the die had a design right at the edge of the hole.&nbsp; Snce the hole was smaller than the coin it was impressed on the edge of the nickel.&nbsp; A commonly seen example of this is seen on the 1901 Pan Amercian encasements.&nbsp; The obverse design was a four leaf clover and the edging and veining of the clover extended right up to the edge of the hole in the die.&nbsp; The hole was slightly smaller than the Indian head cent they used and the edge and veins of the clover extend right out onto the rim of the cent.&nbsp; When you see a cent that has been removed you see some odd markings on the rim and what many people take to be a rim cud between the groups of marks.&nbsp; The &quot;cud&quot; is actually the space on the rim between the leaves of the clover.&nbsp; I wish I could remember which forum it was on, one of these 1901 indians was posted as a what is it within the past week.&nbsp; it was identified and they posted it&#039;s image next to a still encased specimen so you could see exactly what had happened.[/QUOTE]</p><p><br /></p>

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