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<p>[QUOTE=&quot;GDJMSP, post: 1912837, member: 112&quot;]Mmmm kinda but not exactly. Yes you are correct that grading standards used by the TPGs are constantly evolving and changing and that there is no 1 standard used by them all.</p><p><br /></p><p>But the principle of grading certain date/mint combinations stricter or more leniently was established and accepted by the numismatic community as a whole long before the TPGs ever existed. It is and always has been one of the core principles of grading. It is also a necessary principle, which of course is why it was adopted in the first place. And it was necessary to put things on an even playing field.</p><p><br /></p><p>To understand that necessity you first have to realize that not all things are equal when a given coin is minted. There often are and were hub design changes that separate one date or series of dates from another. For that reason alone some dates of a given type must be graded slightly differently. There are and were also changes between different mints using the exact same hub design for a given year. One mint might use higher striking pressure than another, or one mint might have better planchets than another in a given year, or better dies, or less used dies. All of these things, and more, can result in the coins being produced by a given mint in a given year being consistently nicer, or less nice, than the same coins produced at other mints that year. Simply put, it&#039;s the apples and oranges principle applied to numismatics.</p><p><br /></p><p>So no, it is not the TPGs who are responsible for this principle, they merely stuck to it because it is necessary.[/QUOTE]</p><p><br /></p>

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