Quote:
Originally Posted by Republicaninmass
It's weird because 189 gray is tough. But 190 is more plentiful. I know the 177 and 181 are also some of the lowest graded among the gray backs. I assume they didn't change the sheet set up.
Maybe it's 171-179 and 181-189?
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And if you look at some of the known variations in the non-gray back mid-series, you don't find them in the gray backs. #181 Swift PP is but one example. So this implies there were several times they stopped and corrected imperfections.
Maybe they also changed the single & double prints.....