Giant-Size Avengers #1 (Pt 46) Crystal and Mantis

Why is Mantis shown with a big ol' man hand?! What's more the hand is gloved and Mantis doesn't wear gloves. Well, at least the colorist tried to get it right and made it flesh-colored!

1969: Fantastic Four 83 Kirby

1974: Giant-Size Avengers 1 Buckler

Giant-Size Avengers #1 (Pt 31) Captain America, Mantis, Reed and Sue

Giant-Size Avengers #1 (1974) Rich Buckler

Fantastic Four 41 (1965) Kirby

Reed and Sue are from this Kirby cover: 

Fantastic Four #41 (1965) Jack Kirby

Giant-Size Avengers #1 (Pt 22) Captain America and Mantis

Giant-Size Avengers #1 (1974) Rich Buckler

Tales of Suspense #85 (1967) Jack Kirby

Giant-Size Avengers #1 (Pt 3) More Fantastic Four

More Fantastic Four recalls in Giant-Size Avengers #1.

1974: Giant-Size Avengers #1 Buckler            1968: Fantastic Four #79 Kirby

1974: Giant-Size Avengers #1  Buckler               1970: Fantastic Four #99   Kirby                 

1974: Giant-Size Avengers #1 - Rich Buckler

1967: Fantastic Four #61 - Jack Kirby