Avengers #55

55

"Mayhem Over Manhattan!"

August 1968

With Jarvis' help, the Avengers defeat the MOE; the Cowl is revealed as Ultron-5

marvel.com

reprinted in

* 40 Years of Avengers 2006, in collection (2006*)
* Greatest Battles of the Avengers TPB 1993, in collection (1993*)