I've been going down the rabbit hole of vintage athletic typography this week.
At Abercrombie we had a whole basement full of this stuff that we bought at flea markets, estate sales, etc over the years and I spent 100s of hours going through it... now I just do it on Pinterest.
If you ever get a chance to visit a high-end vintage store, I highly recommend it.
Seeing it in person lets you see all the little details of how the ink and appliqué fade and distress over the years - photos don't really do it justice.