X-MEN #12 - A key Silver issue from Marvel published July 1965.
This is a significant issue: 1st Appearance and Origin of Juggernaut (Cain Marko).
✦ CREATIVE TEAM
Writer: Leinil Francis Yu
Writer: Stan Lee
Penciler: Alex Toth
Penciler: Jack Kirby
Inker: Frank Giacoia 'Frank Ray'
Inker: Vince Colletta 'Vinnie'
Letterer: Sam Rosen
Editor: Juggernaut (Cain Marko)
Editor: Professor X (Charles Francis Xavier)
Editor: Stan Lee
Cover_artist: Jack Kirby
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✦ DETAILS
Publisher: Marvel
Era: Silver
Volume: Volume 1
Significance: 1st Appearance of The Juggernaut (Cain Marko)
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✦ NOTABLE FACTS
1st Appearance and Origin of Juggernaut (Cain Marko) PER CGC, THERE IS NO AFFECT TOWARDS THE GRADE FOR A MISSING STAPLE DUE TO MANUCATURING ERROR (SEE OFFICIAL CGC GRADING GUIDE)