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<p>[QUOTE=&quot;anderspud, post: 2391436, member: 76147&quot;]usmc60:&nbsp; A simple visual check will give you positive evidence of flatness.</p><p>Take two similar quarters showing similar wear.</p><p>Place them edge to edge on white background on a flat table.</p><p>Hold a straight flat edge of something like a plastic drafting triangle,&nbsp; &nbsp;&nbsp; held vertically, so equivalent sections of the faces are covered.</p><p>Shine a bright light at the back of the coins and observe the bright light coming through the gap to see if there is a difference.[/QUOTE]</p><p><br /></p>

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