![X-Men #6-1964-Sub-Mariner crossover-Silver-Age Marvel vg- | Comic Books - Modern Age, Marvel, X-Men, Superhero / HipComic X-Men #6-1964-Sub-Mariner crossover-Silver-Age Marvel vg- | Comic Books - Modern Age, Marvel, X-Men, Superhero / HipComic](https://storage.googleapis.com/hipcomic/p/181570055f0f50a392fae218de1b3cc9-800.jpg)
X-Men #6-1964-Sub-Mariner crossover-Silver-Age Marvel vg- | Comic Books - Modern Age, Marvel, X-Men, Superhero / HipComic
![Uncanny X-Men, Part 2: Early Guest Appearances (1964-65), Uncanny X-Men #21-23 and X-Men: First Class Volume I (2006) – Black Gate Uncanny X-Men, Part 2: Early Guest Appearances (1964-65), Uncanny X-Men #21-23 and X-Men: First Class Volume I (2006) – Black Gate](https://www.blackgate.com/wp-content/uploads/2019/12/Marvel-X-Men-23.jpg)
Uncanny X-Men, Part 2: Early Guest Appearances (1964-65), Uncanny X-Men #21-23 and X-Men: First Class Volume I (2006) – Black Gate
![Jack Kirby Museum on Twitter: "[Jack Kirby Today] The X-Men #6 hit the stands on May 5, 1964! Featured in this issue was the first X-Men pin-up - Cyclops - below. Some Jack Kirby Museum on Twitter: "[Jack Kirby Today] The X-Men #6 hit the stands on May 5, 1964! Featured in this issue was the first X-Men pin-up - Cyclops - below. Some](https://pbs.twimg.com/media/EXQ2-NEWsAYwAGh.jpg)