The card is clearly serial numbered 1/1, and the signatures themselves are authenticated by PSA, JSA, Pristine Authentic, and Stan Lee collectibles.
This monster of a card is in an AUTHENTICATED slab (ungraded) and is a true item to be "Marveled" for by Marvel collectors, Spider-Man fans, and those who collect pop culture signatures as well.
Very rare to find both their signatures together, let alone on a 1/1 card!