This issue is a variant of The Avengers (Marvel, 1963 series) #233 [Direct Edition]. There exist further variants.
Continued between Fantastic Four #256 and 257.
Letters on The Avengers #228; Question of the Month "What was the first Marvel comic that you remember reading?" asked to Stern, Byrne, Sinnott, Novak, Scheele and Shooter; Special Announcements Section. Letters from Kevin Scott Collier, Jeffrey Lowndes, Mike Fellinger, Roxanne C. Smith