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<p>[QUOTE=&quot;desertgem, post: 3258391, member: 15199&quot;]The thickness is not a government specification whereas weight and diameter is. The amount of copper in a cent is 3.11 +/-&nbsp; grams, the amount of zinc in the newer cents is 2.50 grams, so the copper ones are thicker because they have more metal for basically the same design and the collar doesn&#039;t let it increase the diameter so it goes higher. jim[/QUOTE]</p><p><br /></p>

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