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[Linked Image from i.pinimg.com]


A modified version of Byrne's anniversary-issue cover for 236.
https://viewcomiconline.com/fantastic-four-1961-issue-236/

I love Stan Lee pictured in the background as part of the celebration.
Somehow Jack Kirby wasn't invited, despite being FF's co-creator.

In a poster Byrne did a year or so later (first as a black and white centerfold in the 1982 FANTASTIC FOUR CHRONICLES, then 2 years later released as this Marvel poster in color), Kirby is , if not visible, still given the co-credit he is due.
https://lh5.googleusercontent.com/-...QQ/6kndMaUpl_o/s1600/ffpostercolor-1.jpg