A price variant intended for distribution in the United Kingdom, with replaced cover price, cover month removed and Thorpe & Porter distribution appended to indicia.
This issue is a variant of The X-Men (Marvel, 1963 series) #6.
Xavier reads a news story about Namor and wonders if he is a possible mutant. Magneto comes to the same conclusion and invades the Sub-Mariner's realm with an invitation to join his Brotherhood. Enchanted by the Scarlet Witch, Namor agrees. The X-Men attack and, during the ensuing battle, Namor decides not to join either team, mutant or no.
in Fantastic! (IPC, 1967 series) #9 (15 April 1967) [Black & white, pages 1-11 only.], #10 (22 April 1967) [Black and white, pages 12-22 only plus additional first page recapping events of the first half of the story.]