The PSA Type System: Should it follow the photography market?

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01-25-2019, 10:18 AM

prewarsports prewarsports is offline

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Join Date: Apr 2009

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Conlon used different paper sizes and types throughout his career and as far as I know, those are not used in dating. I have also seen his earlier stamps re-used on later paper making a definitive dating even more difficult. I tried for a few years to make a catalog of these for more accurate dating, but he made it pretty difficult!

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Last edited by prewarsports; 01-25-2019 at 10:18 AM.

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