| Issue | #52 |
| Published | January 1969 |
| Cover Price | 0.12 USD |
| Pages | 36 |
| Editing | Stan Lee |
| Characters | The X-Men [Angel; Beast; Iceman; Marvel Girl]; Magneto; Erik the Red |
| Genre | superhero |
| Pencils | Marie Severin |
| Inks | Joe Sinnott |
| Notes | Penciler and inker credits supported by Nick Caputo, Bob Ford, and Carl Gafford. |
| Characters | The X-Men [Angel; Beast; Cyclops; Iceman; Marvel Girl]; Lorna Dane; Mesmero (Villain); Demi-Men (Villain; many Death); Magneto Robot (Villain); Erik the Red (Villain) |
| Genre | superhero |
| Script | Arnold Drake |
| Pencils | Don Heck; Werner Roth |
| Inks | John Tartaglione |
| Letters | Sam Rosen |
| Reprinted | in Marvel Special (Marvel Italia, 1994 series) #16 |
| Characters | Beast (origin continued); Hank McCoy (as teenager); Professor X; X-Men [Cyclops; Iceman; Angel]; Norton McCoy; Edna McCoy; El Conquistador (Villain) |
| Genre | Superhero |
| Script | Arnold Drake |
| Pencils | Werner Roth |
| Inks | John Verpoorten |
| Letters | Sam Rosen |
| Notes | The Origins of the Uncanny X-Men! part 15, origin of the Beast part 4, pages 1 and 2 of this story is not reprinted in the Amazing Adventures #17 and X-Men: Mutations #nn reprints. First appearance of Cerebro. |
| Reprinted | in Marvel Masterworks: The X-Men (Marvel, 2003 series) #5; in Essential Classic X-Men (Marvel, 2006 series) #2 [black & white]; in Amazing Adventures (Marvel, 1970 series) #17 (March 1973) [pages 3-5]; in X-Men: Mutations (Marvel, 1996 series) #nn (1996) [pages 3-5]; in Marvel Special (Marvel Italia, 1994 series) #12 (Novembre 1997) [abridged] |