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<p>[QUOTE=&quot;gsimonel, post: 2993521, member: 82549&quot;]Looks like corrosion, not BD. I think the three coins are fourees, and the copper core is corroding in places.</p><p><br /></p><p>BD is like a fungus, and it will grow larger over time. If it doesn&#039;t grow out of the coin and appear bigger after a week or so, it&#039;s probably not BD. If it doesn&#039;t brush off easily, it&#039;s probably just corrosion. Corrosion is very common on ancient coins. BD is not. </p><p><br /></p><p>So for now, just keep an eye on all the coins. Check them regularly for a month or so. If the green isn&#039;t growing, it&#039;s not BD.[/QUOTE]</p><p><br /></p>

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