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<p>[QUOTE=&quot;chascat, post: 2976298, member: 76792&quot;]I have often tried to make sense of the 70 point scale.&nbsp; If you draw a 7 in. by 7 in. box, then at the lower right corner as a pivot point, strike a radius from the lower left corner to the upper right corner, then draw 1 in. grid throughout the box, then label the grid from 10 to 70 from left to right and from bottom to top.&nbsp; Where the grid crosses the radius one grade stops and another starts. You now have a 70 point grading system which makes perfect sense. Notice that the upper right end of the grid has more room for higher grades of UNC. to fall into, with plenty of room for + grades, while the lower grades simply fall into their GD, VG, FINE, V FINE, E FINE, AU. categories.&nbsp; Clearly there is ample space for 60 thru 70 grades at the upper right end of the curve.&nbsp; If the scale is drawn with a straight line rather than a radius, the 70 point scale simply does not work for the upper end coins which most grading is all about.&nbsp; I&#039;ve used this grading scale for some time now as it does make sense of it all.&nbsp; I believe the grading services adopted a very similar method of designation when 70 point grading scale began.[/QUOTE]</p><p><br /></p>

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