I clicked the link,what there I need to look at ?
That 552 isn't listed as imperf between, but 554a and 554b are?
It isn't listed in my old Scott Specialized (96) and not on the SwedishTiger's site. The 2c stamp of that issue is found imperf between both horizontally and vertically in enough numbers to warrant a sub listing. The same cold have occurred while perforating #552. I'd think it would be worth the $20 as an EFO if nothing else.