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<p>[QUOTE=&quot;SuperDave, post: 2360664, member: 1892&quot;]VAMming is identical in every particular to the other variety attribution efforts of most other issues - it&#039;s an attempt to differentiate the die pairs, that&#039;s all. It&#039;s just that with <b>over half a billion coins</b> minted over the lifetime, the size of the task <b>dwarfs</b> anything attempted with numismatic attribution before. Of course the details are tiny in many cases; the law of averages says that the vast majority of die pairings are, um, <i>average</i>. How many other issues have die pairing/variety identifiers for one single year/mint measuring into the hundreds?</p><p><br /></p><p>The reason some Morgans (I&#039;m assuming you mean slabbed ones) aren&#039;t attributed is because neither PCGS nor NGC will attribute more than a small percentage of VAMs, most usually the ones which appear on an official &quot;List.&quot; And neither are particularly trustworthy at attributing the ones they <b>do</b>. ANACS attributes them <b>all</b>, and their Director of Attribution Services, John Roberts, is a major player in VAMming because of his own original work contributing to the body of knowledge. He is easily one of the foremost living experts on Morgan Dollars.[/QUOTE]</p><p><br /></p>

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