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<p>[QUOTE=&quot;robinjojo, post: 7895999, member: 110226&quot;]Those deposits look like accumulations of cuprite, Cu₂O, an oxide of copper.&nbsp; They are extremely hard to remove and I don&#039;t recommend even trying; the coin would probably be worse off attempting this.&nbsp; </p><p><br /></p><p>I say leave as is.&nbsp; It is a rare coin.[/QUOTE]</p><p><br /></p>

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