This is the original MarvelOverpower set, released mid-1995. There were 346 cards including 39 original 3-attribute characters including Spider-Man, Spider-Woman, Carnage, and Venom, each with 5 specials. There were also power cards, universe cards, teamwork cards, training cards, and six missions. The cards were sold in random packs of 17 boosters, and also in pre-constructed 62-card starter decks.
The paper stock is the original heavier grade, smooth card. Copyright on the back of the cards "© 1995 Marvel. Distributed by Fleer."