This issue is a variant of Fantastic Four (Marvel, 1961 series) #252 [Direct]. There exist further variants.
Letters of comment from readers Mark Waldman, Elizabeth Holden, Stu Krull, Matt A. Yockey, Joe Frank, Rod Wahowske, Keith McCafferty and David Allen, with replies from DeFalco.
Follows page 20 of the main sequence.
Precedes page 21 of the main sequence. The Hype Box; The Mighty Marvel Checklist.