X-Men #64 1970 First appearance of Sunfire
X-Men #60 1969 First appearance of Sauron (Alter Ego of Karl Lykos)
X-Men #25 1966 EL TIGRE
X-Men #103 1977
X-Men #34 1967
X-Men #74 1972
X-Men #67 1970
X-Men #36 1967
X-Men #30 1967
Uncanny X-Men #150 1981 (Newsstand Edition) Variant
X-Men #121 1979 First full appearance of Alpha Flight
X-Men #124 1979 (WHITMAN Edition) Variant
X-Men #106 1977
X-Men #123 1973 (WHITMAN Edition) Variant Arcade's Murder World
X-Men #116 1978
X-Men #118 1979 Sun-Fire
Uncanny X-Men #265 1990
Uncanny X-Men #292 1992
X-Men Annual #6 1982 (Newsstand Edition) Variant
X-Men Annual #5 1981 (Newsstand Edition) Variant
Fantastic Four #158 1975 Quicksilver & Xemu appearance.
Amazing Spider-Man #104 1972 Ka-Zar, Zabu, Gog and Kraven appearance., Ka-Zar learns Spider-Man's, secret identity.
Amazing Spider-Man #105 1972 Professor Spencer Smythe and, Spider-Slayer appearance.
Amazing Spider-Man #112 1972 Doctor Octopus cameo on last page.
