Message:

<p>[QUOTE=&quot;GDJMSP, post: 2849507, member: 112&quot;]I agree with the comments that there&#039;s not much you can do, short of dipping the coin. And even that may or may not remove the black spots still present.</p><p><br /></p><p>And I say still present because it is my guess that at some point that coin had a whole lot more black on it than you see now. And the harsh cleaning that was obviously done was done in an effort to remove that black or at least some of it.</p><p><br /></p><p>As for what caused the black, I suspect environmental contamination of some kind. Some kind of something got on the coin probably in the course of storage and caused the metal to corrode. And when it was noticed, somebody tried to get it off resulting in what you see now.[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in