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<p>[QUOTE=&quot;Hobo, post: 1243637, member: 11521&quot;]The odd color does not have to be due to a manufacturing problem. All sorts of chemicals can cause a coin to tone. This coin could have come into contact with some substance along the way that caused it to tone the way it did. </p><p><br /></p><p>There is something called &#039;sintering&#039; that causes a coin to have copper deposited on the suface of the coin during one of the planchet preparation processes (washing I think). I do not think you have sintered coin.[/QUOTE]</p><p><br /></p>

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