The cover artwork was originally intended for The Amazing Spider-Man (1963) #82, but John Romita's original art was lost, and Marie Severin & Romita quickly illustrated a new cover to use in its place. Romita's art was later found, and is the cover to this issue which reprints The Amazing Spider-Man (1963) #82!
The Amazing Spider-Man issue reprinted here was edited/cut in order to accommodate a reduced page count. (This difference in page count affected most ASM reprints during Marvel Tales #59-136.)
This issue incorrectly cites the reprinted ASM issue as #63.