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<p>[QUOTE=&quot;GeorgeM, post: 1101159, member: 28550&quot;]Refining metals (and removing trace impurities) is a pretty tricky and complicated process. Removing those last couple thousandths of a percent of unwanted material gets exponentially more difficult. </p><p><br /></p><p>Still, I&#039;d like to learn more about this. What are the earliest .986 gold items that you&#039;re aware of? What about 0.999 gold &amp; silver items? I don&#039;t have anything in my collection that predates WW2, but I don&#039;t have a comprehensive group by any means.[/QUOTE]</p><p><br /></p>

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