From Here to Alternity!: Having summoned the heroes to the Tomorrow Complex within Mt. Rushmore (see cut-away view on page 4), Infra-Man explains that they are seeking the source of...  

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Victory Vanguard Pin Up: A classic cover of Modern Mystery Comics starring U.S.A., The Fighting Fury, American Beauty and the original Hypernaut, facing Nazi nasties! (Sorry, King Zero...  

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Tomorrow Syndicate Pin Up: "It's that itsy-bitsy ingenue, Infra-Girl" - challenged by even teenier moth-riding femizons! Signed "gebwood".

Issue note: you probably want to know: U.S.S.R. stands for Ultimate Soviet Super Rogue!

Series note: a wrap-up issue, 1963 Double Image Eighty-Page Giant-Size Special, was said to be in production, but was never published. The working title for the story was "All This and Earth²!!" Check the Wikipedia entry for "1963 (Comic)" and follow the links for series-related trivia.