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Message:: [QUOTE="Jaelus, post: 7865689, member: 46237"]Except how would you map quality to those grades? AU58 is an exception. Some 58s are there legitimately as coins that circulated but very lightly. Those are the coins that are a step up from 55+. All the other coins are ones that likely did not circulate but were uncirculated coins with some mishandling generally from various types of storage (not necessarily collector storage). All those coins had some MS grade before acquiring the wear. Those are easy to map to 6X because it is essentially the original grade recalculated taking into account the location and severity of wear as if it was any other mark. So a 64 with high point rub could be a Q63 AU for example, and it would have the appearance of a 63 with high point rub, but no other characteristics of circulation that a 58 would have like luster breaks in the fields, hairlines, etc. Those would still cap a coin at Q62 AU. It's better than calling it MS62! It's also easier to teach people to grade on this scale. I have a Peace dollar that is a 58. In hand it looks superior to my 65. Aside from the very slightest rub, it presents like a 66. It's very easy to explain this looks like a 66 with virtually no wear so it is a Q65+ AU. What's hard to explain is why a coin that puts my MS65 (Q65 MS) to shame should be relegated to a 58.[/QUOTE]