This original version is a page longer and has a couple of rather witty touches which put the lie to the concept "If our meddling with time changed anything, we'd notice!"
This never-reprinted story, penciled by Harry Lazarus and inked by George Klein, from Atlas' Astonishing #9 (1952) is based on one of the basic rules of time-travel; "don't change anything in the past, or you'll alter the future"...which is in direct contradiction to another of the basic rules of time-travel; "no matter what you do, you can't change the future".
Hey, I'm just telling you the rules.
I never said they made sense...