Fantastic Four pin-ups by John Buscema from Captain Britain #39, a British reprint magazine, published by Marvel UK, July 6, 1977.
So I’ve had a few people write to tell me these are Kirby pin-ups, not Buscema, which I suspected was the case although I can’t find a definitive source online. Certainly the Sue one looks like vintage Kirby, but I wasn’t 100% sure since each issue of Captain Britain included reprints from Buscema’s post-Kirby run on Fantastic Four. Anyway, I want this blog to be as accurate as possible so I really appreciate when people take the time to let me know about things I may not have straight. Thanks!