Error - Off Center

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How is it that that NGC determines the % that a coin is off center? Also, is there an accurate way that I could determine the % off center on my own? Thank you!


Justin smile.gif

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NGC uses a gauge to measure the percentage off-center. Another way would be to do it mathamatically. Use a standard such as millimeters, and divide the amount of blank area (of the planchet) by the total diameter of the planchet. This is the percentage that the coin is off-center.

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