I am almost certain that this is not a real Willie Mays autograph, as I have a Topps certified Mays autograph from the same time this auto was purportedly acquired and they don't look even close. But since it is one of the key autographs I have yet to get for my signed 1963 Fleer set I figure I will just double check with folks who have far more expertise in these matters.
Found here:
http://www.ebay.com/itm/SIGNED-WILLI.../131596542653?
Thanks,
Jeff Carlson