Hi Al,
Can't speak for every year, but for 1952, I'd say nope. You couldn't do it with just any random card in the set. At least with regard to RECURRING print defects. Sure if you count one time defects on a card as a variation like the Bartirome with the overprinted red ink on back - you probably could find something on every card in the set. But in my opinion, that card is not a variation. It's just a one off printing mistake. Makes it one of a kind. But not an addition to the checklist.
Cheers,
Patrick
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