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<p>[QUOTE=&quot;satootoko, post: 31381, member: 669&quot;]Welcome to the forum.Check the weight.&nbsp; If the &#039;79 weighs in at a standard 3.11g (compared to 2.5g for the &#039;02), it is almost certainly <ul> <li>gold plated, or</li> <li>discolored from contact with some type of chemical.</li> </ul><p></p><p>A light gold plating would add no noticeable weight, and could result from a high school kid fooling around in chem lab, or one of the many souvenir-production activities that have occurred over the years - some commercial and some &quot;for fun&quot;.</p><p><br /></p><p>Also, copper is capable of turning virtually any color in the rainbow when affected by various chemical compounds, in liquid or vapor form.</p><p><br /></p><p>From the even appearance of the coloring, my guess is plating.[/QUOTE]</p><p><br /></p>

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