Up for sale is X-Men #125 (Marvel Comics, September 1979), certified and slabbed by CGC at 9.2 (Near Mint Minus) with Off-White to White pages.

CGC Cert #: 3759149013 Grade: 9.2 — Near Mint Minus Pages: Off-White to White Label: Universal Variant: U.K. Price Variant — 12p cover price

Story: Chris Claremont Art: John Byrne & Terry Austin Cover: Dave Cockrum & Terry Austin

Key Content: 1st appearance of Mutant X (Proteus); Mastermind appearance; Magneto cameo

Key issue from the classic Claremont/Byrne/Austin run — the first appearance of Proteus (Mutant X), kicking off one of the most celebrated storylines of the Bronze Age.

About UK Price Variants: UK Price Variants were printed for British newsstand distribution at roughly 5% of the US print run, with surviving copies estimated at just 1-2% of total prints due to overseas shipping wear — making high-grade UKPVs exceptionally rare.

Ships boxed and padded. Combined shipping available on multiple slabs.