[packs]

I would just hesitate to call them baseball cards. How do you know they're cards? I know they have printer's mark for cutting but cutting something up doesn't make it a baseball card by virtue of the square having a picture of a baseball player on it.

I think the intention can't really be determined from this one sheet. They could be part of an advertising piece, a calendar, any kind of print media really. All we know for sure is that the images may have been meant to be cut out. But for what ultimate purpose is impossible to know.

For example, how do you know these weren't images intended to be arranged for a notebook cover? There's just as much precedent for that as there is for baseball cards.