Avengers #71 Marvel 1969 CGC 8.0 / Black Knight Joins / 1st App of The Invaders

This key issue features the first appearance of The Invaders and the joining of Black Knight to the superhero team. With characters from the Avengers, Squadron Sinister, and Invaders, this color comic book is a valuable collectible for fans of US Comics, especially those interested in superhero teams and first character appearances.