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<p>[QUOTE=&quot;Insider, post: 3658474, member: 24314&quot;]Yes, starting at the end of 1972, the first authentication service in the US, graded each side by strict technical standards for internal records to help ID the coin that they authenticated.&nbsp; Later, the second TPGS located in Colorado issued certificates with each side graded and other qualifiers.&nbsp; After changing to plastic slabs, I believe they assigned only one grade for both sides but they also assigned a net grade too.</p><p><br /></p><p>Net grading is stupid. One single grade for both sides does not completely describe very many coins but that&#039;s what we have today although many of the grades used to represent a coin&#039;s condition have changed substantially.[/QUOTE]</p><p><br /></p>

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