6c Navy (O38). Original gum, spectacular Jumbo margins, bright shade, Extremely Fine Gem, a magnificent Jumbo-margined example of the 6c Navy, with 2010 P.S.E. certificate (XF 90 Jumbo; SMQ $360.00 as 90), one other 90J and a 98 have been graded by P.S.E., a remarkable and telling statistic is that the next highest OG grade is 75, evidence that the 6c Navy is a very difficult issue

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