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<p>[QUOTE=&quot;Spark1951, post: 3157219, member: 90692&quot;]I gave Oldhoopster a best answer for his post, he is spot on.</p><p><br /></p><p>Brass is an alloy of copper and zinc, bronze is an alloy of copper and <i><b>tin</b></i>, with other impurities as well.&nbsp; The specific alloys for copper and copper plated zinc cents can be found in any copy of Yeoman&#039;s Red Book, by year and design variance.&nbsp; Or you could search the web.</p><p><br /></p><p>What I take away from OldHoopster&#039;s post is that your yellow, brassy looking 1983 cent <i><b>probably </b></i>spent time in a copper plating bath that had substantial zinc dissolved in it, meaning the bath was used beyond proscribed limits.&nbsp; Also cogent is his info on the expense and difficulty in determining the brass content.&nbsp; </p><p><br /></p><p>Keep in mind that, in World War 2, recovered/recycled ammunition brass casings were reused to produce coinage.&nbsp; Once again, R.S. Yeoman&#039;s Red Book has data on the years it happened.</p><p><br /></p><p>Spark[/QUOTE]</p><p><br /></p>

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