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<p>[QUOTE=&quot;brg5658, post: 1292401, member: 29751&quot;]This thread is useful for slab types:&nbsp; <a href="http://boards.collectors-society.com/ubbthreads.php?ubb=showflat&amp;Number=2248404" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://boards.collectors-society.com/ubbthreads.php?ubb=showflat&amp;Number=2248404" rel="nofollow">http://boards.collectors-society.com/ubbthreads.php?ubb=showflat&amp;Number=2248404</a></p><p><br /></p><p>As for using the NGC Certification Numbers, they can not be used as a direct indication of the date a coin was graded or slabbed.&nbsp; The first 7 (and on older slabs the first 6) digits of an NGC certification number are the invoice number under which the coins were submitted.&nbsp; The last three digits after the hyphen are the coin number on that invoice.&nbsp; For example 1234567-005 would be the 5th coin on invoice number 1234567.&nbsp; Because the invoices were historically paper forms, it was possible that people would have piles of these forms and could submit them many many years after the forms were printed.&nbsp; Thus, the number isn&#039;t associated with a chronology of submission, but rather a chronology of when the invoices were printed.&nbsp; Thus, some people may still be submitting coins on invoices with quite low certification numbers.</p><p><br /></p><p>However, in general practice, 6-digit leading NGC numbers are coins graded quite a while ago.&nbsp; And, if you see an NGC coin in a holder with a 6-digit leading certification number in a newer NGC holder (EdgeView) it is more likely that this coin was reholdered than that it was from an old submission form.&nbsp; By that I mean, when you take an old scratched up NGC holder and send it in to NGC to be put in new plastic, the number goes along with the coin in the new holder and on the new label.[/QUOTE]</p><p><br /></p>

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