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<p>[QUOTE=&quot;Oldhoopster, post: 8068318, member: 84179&quot;]Here is my explanation, which may or may not be accurate, but at least it seems plausible to me.</p><p><br /></p><p>DDD - the metal on the hardened die erodes leaving flow lines and distortion of the devices, particularly in areas of high metal movement.&nbsp; It is caused by an abrasive mechanism after tens of thousands of strikes.&nbsp; IMO, luster formation is just the early stages of die deterioration.</p><p><br /></p><p>Design Creep - I believe there could have been an anomaly in the working die hardening process which resulted in one/some working dies not being properly hardened.&nbsp; As mentioned in error-ref, the die spread out like the hammered end of an old chisel.&nbsp; I think a hardening error explains the spreading and why it is only found on the specific date.&nbsp; </p><p><br /></p><p>Just my thoughts on potential explanation.&nbsp; Please comment if anybody feels I missed something[/QUOTE]</p><p><br /></p>

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