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<p>[QUOTE=&quot;SuperDave, post: 105767, member: 1892&quot;]The answer to your questions tends to illustrate the degree of obsession some collectors invest into their work. As a guess, 50k coins is a good life for a die. Dies are, as a result, switched around and variously matched over their lifetimes.</p><p><br /></p><p>Collectors like Van Allen and Mallis looked at thousands upon thousands of coins during the process which culminated in the publication of the Comprehensive Encyclopedia. They noted the sometimes-microscopic differences which characterized specific dies, and cataloged the combinations thus identified. Although I don&#039;t know about &quot;billions,&quot; the number of potential permutations is certainly right up there. The number of additional VAMs identified just since the 4th Edition was published in 1998 (IIRC) probably equals the total number identified in the book.</p><p><br /></p><p>That&#039;s why the efforts of people like nesvt are ongoing - in no way have all the potential errors been found, nor will they be in the forseeable future. There are people all over the country, like me, poring over their coins under serious magnification for hours at a time, looking for previously-unidentified errors.[/QUOTE]</p><p><br /></p>

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