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<p>[QUOTE=&quot;John Anthony, post: 25284372, member: 42773&quot;]Billon is any alloy where the base metal is a larger percentage than the silver, 51% and up. Salonina&#039;s antoniniani are definitely billon, even though they frequently look somewhat silvery. It&#039;s surprising how little silver you need to add to copper to make it look silvery. Plus, the Romans had techniques for coating base metal coins with a thin layer of bright alloy (usually some combination of zinc, antimony, and lead). Those coins are said to be &quot;silvered.&quot;[/QUOTE]</p><p><br /></p>

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