My StampManage Software (2012) does not have an entry for a 563a. Does Scotts Catalogue still list the 563a as a distinct color variation? My Scott Catalogue (now a bit outdated ...2005) lists a 563a. But the new SM software does not.
I have a half dozen of these 563s and not two of them are the exact same shade.
This happens so frequently with early US stamps that I find it easier to just collect a half dozen or more of the same stamp (where feasible) and mount them as color variations...
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