The sheet you have on top has a total printed width which is smaller than the under-sheet. The total printed height is also longer than the under-sheet. This is consistent with these two sheets being printed on slightly dampened paper, but cross-grain to each other, which shrinks differently with the grain vs across the grain. I see nothing more.
During actual production, I suspect the pressmen were careful to feed the sheets in the same direction to get a consistent result to the dried sheets. This drying effect would have been common knowledge back then.