The distribution of the numbers of graded cards from the set is consistent with what you'd expect if all the cards had been printed in equal numbers. Possibly some card(s) were double-printed or short-printed, but there's no particular evidence of that. My guess is whichever ones are rarest today just became that way more or less by chance. Some of them have 1 or 2 more surviving copies than the average card in the set; some of them have 1 or 2 fewer. It would be astonishing if that didn't happen.
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