In addition to being a helluva card, Scott's 1923-24 Ruth illustrates an urban myth about the 1921-24 issues, which is that you can always tell the American League cards from the two years apart based on the use of "Am.L." instead of "A.L." The 1922s used "A.L." as did new cards in 1923:
But recycled images like the Ruth did not.
Images that went through background changes were re-lettered with A.L., so you can tell them apart with that technique:
Which makes total sense since they were redoing the underlying artwork rather than recycling it with a border on it as they did with the Ruth.
I suspect that the urban myth got its start about 30 years ago when Beckett grouped all three sets into a single listing in its book.
Sorry to pontificate a bit, I just find the issue fascinating. Exhibits are just not susceptible to a uniform set of rules. They are what they are, except when they aren't.