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davidcyclebackAdam is correct. There may indeed be reprints on the market (there's reprints of a lot of stuff), but I have examined square corner cards that are genuine. In particular, microscopic examination of particular cards showed that the printing was vintage. I don't have an opinion about how the cards were cut-- whether the squares were cut later from sheets or whatever. How/when the cards were cut may be the grading companies' issue or question that prevent them from grading-- you'd have to ask them about that. But, putting aside the issue of cutting, there are square cards that are legitimate.