I've got a number of Harvard football stubs from the 1900-1910 range (not from this scrapbook find), and the stubs definitely are perfectly torn. There definitely appears to be some fine perforations on them.
Here are a couple of those stubs, along with one of these proof tickets as well. They all appear to have had perforations for the stub. (Sorry for the crappy pic - it's the best I can do at work right now!)
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