X-Men (1963 1st Series) Mark Jewelers #125 CGC 9.0 White Pages [Jewelers]
X-Men 125 CGC 9.0 White Pages [Jewelers Insert]
As the cover says: the dramatic return of Phoenix! "There's Something Awful on Muir Island!" "...!" Story by Chris Claremont and John Byrne. Art by John Byrne and Terry Austin. First appearance of Mutant X (Proteus). Cover price $0.40.