Ah, but if it's not from being doubleprinted then it would pass the changed on purpose test. The mask had a defect, and at some point they fixed it so the lines were eliminated. If it's doubleprinted, then it's not on purpose, but that one part of the mask had the defect and another didn't. Much like the 63 that's being discussed, or for sure the variations of the 52 Mantle. Which weren't done on purpose.
That's one of the problems with variations, most criteria based on what caused it can open the door to a vast array of tiny stuff, while possibly excluding major differences.
I keep mine sorted based on a few different things.
Major recognised ones go with my set.
unrecognised ones that are differences in the printing plate have their own box.
Ones that are from plate wear are separate.
And genuine printing errors - miscuts, badly out of register, missing colors etc have their own box.
Steve B
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