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<p>[QUOTE=&quot;-jeffB, post: 12319038, member: 27832&quot;]That third link... man, I&#039;ve gotten lazy. 30 years ago I was <i>writing</i> notation like it uses in the algorithm discussions, and now I just glaze over. I might study it later as a brain exercise.</p><p><br /></p><p>I guess I&#039;ve been sort of assuming that PCGS <i>does</i> use the simplest chips, just because they&#039;re cheapest, and they can&#039;t be copied unless you have the slab in hand. (That&#039;s assuming that the chip doesn&#039;t simply transmit <i>the coin&#039;s own certificate number</i>, which also wouldn&#039;t completely surprise me.)</p><p><br /></p><p>Do you need a PCGS-issued reader for these, or can you read them with a generic RFID scanner? If the latter, I <i>think</i> it would point to them using the simplest chips... but as I&#039;ve already shown, I&#039;m a bit out of my depth here.[/QUOTE]</p><p><br /></p>

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