AVENGERS (1963) #158

Wonder Man versus the Vision! Witness a true battle between brawn and telekinetic sentient energy. When Avengers Clash!! Vision attacks Wonder Man because of his closeness to the Scarlet Witch. The Avengers travel to an isolated research facility in the Canadian Rockies and are defeated by Graviton. Notes Features the Hostess Cup Cakes ad, Spider-Man! The Champ This is the first appearance of Graviton.