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barrysloateMatt's idea adds to what I suggested on a different thread. If we had a link at the top of the page that directed us to pertinent information, such as lists that rate scarcity of backs, color variations, etc., we could also have a link (in spirit kind of like wikipedia) where contributors could study a set, demonstrate why they feel it is not dated correctly, and provide their research. Eventually, we would collectively revise the information in the current guides and provide them with more accurate dating.