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<p>[QUOTE=&quot;mikediamond, post: 4511573, member: 1859&quot;]The reasons for sudden reductions in striking pressure are numerous and complex.&nbsp; The most likely proximate cause is a sudden increase in minimum die clearance.&nbsp; As far as ultimate causes are concerned, there&#039;s no way to determine them.&nbsp; However, it&#039;s reasonable to presume that errors like this are the result of spontaneous equipment malfunction.&nbsp; You can find double- and triple-struck coins that incorporate a weak strike in which all strikes are die-struck on both faces and all are generated by the same die pair.&nbsp; Combinations include a normal strike succeeded by a very weak strike, a very weak strike succeeded by a normal strike, or a triple strike in which only the middle strike is very weak.&nbsp; The combinations are endless.[/QUOTE]</p><p><br /></p>

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