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<p>[QUOTE=&quot;-jeffB, post: 24588736, member: 27832&quot;]Well, you could presumably <i>alloy</i> heavier and lighter metals to get an exact match -- and then it would have such different <i>electromagnetic</i> characteristics that it would fail immediately on something like a Sigma.</p><p><br /></p><p>The last couple I got were apparently silver-plated copper, which I still think might fool a Sigma, but makes the coin about 10% thicker to hit the desired weight.[/QUOTE]</p><p><br /></p>

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