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<p>[QUOTE=&quot;Pickin and Grinin, post: 3373647, member: 73995&quot;]I am wondering if this effect is from the way the planchets were prepared, like the Kennedy Half&#039;s. The mint in the 80&#039;s bought a new machine that literally seemed to polish the blanks with steel balls.</p><p>It is called &quot;Burnishing&quot;. I wonder if it hardened the steel so much that the planchet imperfections were hard to remove when struck.</p><p>I am not sure but the high speed presses could also be part of the culprit.[/QUOTE]</p><p><br /></p>

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