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<p>[QUOTE=&quot;NorthKorea, post: 1680058, member: 29643&quot;]Are you seeking a mathematical estimate (0.90 * total weight in grams) or an answer specific to a specific coin?</p><p><br /></p><p>Typically, with the exception of 40% silver coins (which are actually 80% silver on the outside and 20% on the inside or something), we assume the distribution of silver content to be balanced through the coin. The reason 40% silver coins are different is they will typically lose a higher proportion of their silver with wear. After all, if the outside is 80% and the coin is 40%, the assumption is that every percent of mass lost on the outside will account for a 2% drop in the overall silver content of the coin.[/QUOTE]</p><p><br /></p>

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