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<p>[QUOTE=&quot;gsimonel, post: 2972228, member: 82549&quot;]It doesn&#039;t look like bronze disease to me. I think the coin was heavily corroded with a think, blue-green patina. Someone may have removed most of the patina, or, more likely, the patina was very fragile and just disintegrated. Just to be sure, let the coin sit out for a week or so. If it does have bronze disease, you will see a blue-green powder powder start building up, almost growing like a fungus, that you can just brush away with your finger. Then it will be time to act, for bronze disease damages your coin. But I don&#039;t think BD is likely in this case.</p><p><br /></p><p>Removing the rest of the remaining patina, either chemically or through electrolysis, may improve the coin&#039;s appearance somewhat, but you&#039;ll still have a heavily pockmarked surface.</p><p><br /></p><p>I assume that both coins were fairly inexpensive. I think, if you are just starting out with ancients, this is a reasonable way to go. A beautiful Caligula as will cost you many hundreds of dollars, and there are many forgeries out there because of its high demand and subsequent value. You can be certain that your coin is not a forgery.</p><p><br /></p><p>Buying at a coin show is a great way to get introduced to the hobby. If you see a dealer with a lot of ancient, take a few minutes to introduce yourself to him or her. Most dealers love to talk about their coins.[/QUOTE]</p><p><br /></p>

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