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<p>[QUOTE=&quot;mikediamond, post: 112577, member: 1859&quot;]This appears to be a case of finned rims.&nbsp; The fins were subsequently flattened and abraded.&nbsp; Finning occurs as a result of excessive striking pressure or slight die tilt, which increases striking pressure at one pole.&nbsp; The increased pressure forces metal into the narrow gap between die neck and collar.&nbsp; Since you&#039;ve got a 360 degree fin (at least on the reverse), it would appear that overall striking pressure was abnormally high.&nbsp; Finning is rather common, although very high fins do command a premium.&nbsp; Damaged fins are not in high demand.[/QUOTE]</p><p><br /></p>

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