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<p>[QUOTE=&quot;Kevin Mader, post: 6475676, member: 106826&quot;]I&#039;ve never seen a satisfactory answer for the groove under the outer devices.&nbsp; Given how much material is flowing at the point of coining, it is in my opinion, not related to the planchet (i.e., it would fill in during the strike).&nbsp; Given that this phenomenon happens very close to the edge making me suspect that a collar is involved.&nbsp; Perhaps [USER=86437]@Fred Weinberg[/USER] can suggest what is happening here.&nbsp; I have seen this a few times with cents and nickels over various CRH events, so it happens often enough I suppose.[/QUOTE]</p><p><br /></p>

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