X-MEN #131B - A key Bronze issue from Marvel published March 1980.
This is a significant issue: 1st Appearance "SALVATORE" aka Sally (Hellfire Club); 1st Appearance of Hell Fire Knights (operatives); 2nd Appearance of Dazzler.
✦ CREATIVE TEAM
Writer: Chris Claremont
Penciler: John Byrne
Inker: Terry Austin
Letterer: Tom Orzechowski
Editor: Dazzler (Alison Blair)
Editor: Roger Stern
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✦ DETAILS
Publisher: Marvel
Era: Bronze
Volume: Volume 1
Edition: NEWSSTAND EDITION
Significance: 1st Appearance of Hell Fire Knights (operatives) - 2nd Appearance of Dazzler - 1st White Queen Cover