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<p>[QUOTE=&quot;Kevin Mader, post: 6586816, member: 106826&quot;]Here&#039;s the link to Pete&#039;s article: <a href="https://conecaonline.org/rockwell-hardness-test-marks-on-lincoln-cents/" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://conecaonline.org/rockwell-hardness-test-marks-on-lincoln-cents/" rel="nofollow">Rockwell Hardness Test Marks On Lincoln Cents | CONECA (conecaonline.org)</a></p><p><br /></p><p>I particularly appreciated the point on the 1995 cent (zinc substrate).&nbsp; The T scale makes sense to me relative to the thickness and softness of the material (it&#039;s what I would have done).&nbsp; I am surprised to read that there is some consensus that the penetrator mark would survive the minting process.&nbsp; That said, most coining I&#039;ve seen done was being done on much larger equipment.&nbsp; </p><p><br /></p><p>Not something that I expected to learn today...but learn I did.[/QUOTE]</p><p><br /></p>

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