Iron Fist #15, page 11 by John Byrne & Dave Cockrum & Dan Green. 1977.
Dave Cockrum at the direction of Jim Shooter, redrew the faces of the X-Men in this issue of Iron Fist. Specific to this page, he also drew the “Fang” costume as John Byrne originally drew Wolverne’s regular costume.
To quote JB:
"I drew Wolverine in his usual duds, and editorial had them redrawn as the Fang outfit. Lot of redrawing on that issue. Virtually none of the X-faces are mine. Since it was my "audition" for UNCANNY, it seemed very odd to allow Dave [Cockrum] such liberties. At the time, I asked if he was going to redraw all the faces in the regular title once I came aboard."