Just my opinion, but if it were me, I would put it in Pages and preserve it in its perfect shape.
I wouldn't grade it as the cost to grade it would be pretty steep.
Another option would be to put them all in Hard plastic single sleeves, but IMO that takes away fro the aesthetics rather then putting them in pages and book.
BTW, the next time you see some Basketball from the 70's, my son would LOVE them. :-)
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