Tales of Suspense #13
Comic Book: Marvel: "I Lived A Million Years!" (01/30/1961)
An Asian tyrant bleeds his subjects dry to build a suspended animation machine and avoid nuclear war. He sleeps for a million years, but when he emerges humanity has abandoned Earth and he faces a harsh and primitive world.
[Reprinted in Marvel Masterworks: Atlas Era Tales of Suspense #2]
-- http://www.comics.org
Tales of Suspense #15
Comic Book: [Marvel Valentine Special #1/3] (March 15, 1961)
Goom (mental powers, immense head) has a time machine able to change the age of others. [Reprint in: Man-Thing Giant-Size #1]
-- Monster Blog & Visible Time
Tales of Suspense v1 #23
Marvel Comic Book: "The Creature from the Black Bog!" (11/01/1961)
A couple regain their youth. (adults made younger)
-- Jeffr_2bya
Tales of Suspense v1 #30
Marvel Comic Book: "The Man Who Couldn't Grow Old!" (06/01/1962)
A man wants eternal youth. (Corpse Age Stasis)
-- Jeffr_2bya