This probably doesn't belong here, being a 350 series. I'm not even sure it would be considered a scratch. Maybe just a printing error. But it is unique enough, I think, that it probably could be matched up with other cards.
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BTW, unreal research going on here.
It still blows my mind, with the tens of thousands of sheets printed, not one is known to survive. But, I guess, that's what makes it fun !!!