X-Men #1 comic book published by Marvel in September 1963. Comic book is the very first appearance of X-Men, including Angel, Beast, Cyclops, Iceman, Marvel Girl, and Professor X and Magneto. Currently #4 on Overstreet's list of Top 50 Silver Age Comics. Missing cover and first advertisement page, though story pages are all intact. Center page detached from top staple. Minor wear to interior.