"I love baseball cards" on YouTube has some videos on his channel that show what I believe are some "original" Christmas racks. I was skeptical at first, but he has had multiple instances of finding (nice) cards including stars that are not on the top, and other valuable cards. One '56 rack has a Mantle showing, one has a '55 Aaron visible with the back showing, and in another he pulled the '52 Topps Joe Page with the Sain error back - that was not showing on the top. That one was sent off for grading and I believe returned a PSA 5. That's like a > $1k card, so hard to believe anyone would pack a remake with something like that.
Here is one of his videos with a '60 Topps rack:
https://www.youtube.com/watch?v=LxCes-ejGo0