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<p>[QUOTE=&quot;GoldFinger1969, post: 24624366, member: 73489&quot;]Yup, that&#039;s pretty much what I do.&nbsp; I just figured if I could get my hands on 3-5 population reports I would have a 30,000 foot view of The Big Picture.</p><p><br /></p><p>I find the Heritage Archvies commentaries to be very useful, too.</p><p><br /></p><p>Roger Burdette employed an algorithm in his Saint-Gaudens DE book.&nbsp; I believe he haircutted the NGC totals by ~ 40% to eliminate double-counting, re-submissions, etc.&nbsp; I am sure the figure is tweaked depending on the coin, cost, numbers out there, likelihood of crackouts (i.e., much more likely for a 1929 than a 1924), etc.[/QUOTE]</p><p><br /></p>

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