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<p>[QUOTE=&quot;Conder101, post: 3208272, member: 66&quot;]The tissue test results are intriguing.&nbsp; (It looks though like the light may have been on the left side though and if so the left hand coin may have received more light which may affect its apparent whiteness under the tissue&nbsp; compared to the coin on the right that wasn&#039;t receiving as much light.&nbsp; Straight weights aren&#039;t going to tell you anything because the tolerance range for 40% and coppernickel overlap something awful.&nbsp; Two other tests would be specific gravity or an XRF test..&nbsp; But you would need a much more precise scale for a SG test.&nbsp; XRF tests can be useful but can be fooled by a surface plating.&nbsp; (So can the tissue test.[/QUOTE]</p><p><br /></p>

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