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<p>[QUOTE=&quot;Lev99, post: 20637311, member: 103627&quot;]I ran across an article a while back about the 1 pound coin counterfeiting problem, and fluorescent tagging technology present in 2017 dated coins and afterwards. There’s not a whole lot of information on the subject (security thru obscurity), but I was able to find some patent information the Royal mint applied for. </p><p><br /></p><p><a href="https://patents.justia.com/assignee/the-royal-mint-limited" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://patents.justia.com/assignee/the-royal-mint-limited" rel="nofollow">https://patents.justia.com/assignee/the-royal-mint-limited</a></p><p><br /></p><p>They mention upconverters, downconverters, or phosphors as being embedded in the coin plating, or some other possible technology.</p><p><br /></p><p>Curious if anyone has looked into this? Or would have ideas on how to detect it. It seems maybe uv light or lasers may be needed to activate the tagging technology. </p><p><br /></p><p>I kinda wonder if the silver eagle has this technology as well. When the 2022 ase came out there was similar super “security feature” and nobody mentioned anything further.[/QUOTE]</p><p><br /></p>

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