This issue is a variant of Superman (DC, 1987 series) #75 [Memorial Edition]. There exist further variants.
1993 Triangle #2. Page count includes a gatefold back cover.
Story continued from Superman: the Man of Steel (DC, 1991 series) #19 and story continues in Justice League America (DC, 1989 series) #70. The last three pages are part of a 3-page glossed foldout.