Splash page from DAREDEVIL #51 by Barry Windsor-Smith and George Klein.
Cover to AVENGERS #60 by John Buscema and George Klein
A number of changes were made to this cover, including repositioning the observing heads of the Avengers, reworking the Ringmaster’s hand and adjusting the trail of the snake, and adding the Vision’s head to the corner box.
The cover to AVENGERS #62 by John Buscema and George Klein.
Looks like that Black Knight head was statted and repositioned.
A page from FANTASTIC FOUR #1 by Jack Kirby and an unknown inker most generally believed to be George Klein at this point.
This is a production stat, rather than a scan of any actual original artwork.
A page from AVENGERS #54 by John Buscema and George Klein or George Tuska (both of them worked on this issue)
A few of Buscema’s border notes remain:
MACHINE (word obscured) TURN HIM INTO
KLAW MERCIFUL HEART PREVENTS HIM FROM DOING IN JARVIS BECAUSE