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<p>[QUOTE=&quot;paddyman98, post: 2560525, member: 44615&quot;]The look of Bronze is natural coloring due to 43 years of circulation.</p><p><br /></p><p>But if the composition included too much Zinc, 12% instead of 5%.. you could have that Bronze/Brassy look. This would be considered an Improper Alloy Mix</p><p><br /></p><p>I want to share this webpage with you - <a href="http://www.error-ref.com/improper-alloy-mix/" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.error-ref.com/improper-alloy-mix/" rel="nofollow">http://www.error-ref.com/improper-alloy-mix/</a></p><p><br /></p><p>Quote - &quot;<i><b>Definition: </b>The term “improper alloy mix” can apply to two related errors. The constituent metals of a solid-alloy coin can be well-mixed but in the wrong proportions.&nbsp; In the case of a copper-alloy cent with too much tin or zinc, this will result in a brassy color</i>.&quot; closed quote[/QUOTE]</p><p><br /></p>

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