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<p>[QUOTE=&quot;Insider, post: 2414862, member: 24314&quot;]I should like to add my opinion as a clarification.</p><p><br /></p><p>In the 1970&#039;s, ANACS authenticators taught that &quot;excess metal&quot; (EM) referred to the raised, solid lumps and large pimples that was found on the surface of counterfeit coins in places where it did not belong - such as lumps in the field or next to the coins relief.&nbsp; The same characteristics found on genuine coins were called die chips or die rust.&nbsp; EM was never a residue. </p><p><br /></p><p>Casting bubbles were mostly round so called casting bubbles even though they were EM - usually trapped in the coins relief.&nbsp; Nevertheless, any rough shaped raised metal trapped in the relief of a cast coin WAS called EM.</p><p><br /></p><p>When I read that the coin has excess metal residue in the edge, I visualized the minute, usually microscopic, flake-shaped, silver colored residue (often the powder metal file-like particles) made when edge reeds are applied to the fake.[/QUOTE]</p><p><br /></p>

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