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<p>[QUOTE=&quot;Oldhoopster, post: 5323004, member: 84179&quot;]Not exact, but here&#039;s what I do.&nbsp; Look up or measure the regular diameter of the coin.&nbsp; Let&#039;s call it d1.&nbsp; Then measure the distance along the planchet from the rim to the struck area (d2)</p><p><br /></p><p><b>(1-(d2/d1))*100 = % off center </b></p><p><br /></p><p>Since nearly all off centered errors are rounded to the nearest 5% (and a lot if people just eyeball it), the simple math will give you good answer</p><p><br /></p><p>Note: I don&#039;t measure the diameter of the struck portion because metal will flow beyond the normal coin diameter and if used, could slightly underestimate the %[/QUOTE]</p><p><br /></p>

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