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Hora Cero was an Argentine comics anthology magazine which ran between 1957 and 1963. The magazine was established by Héctor Germán Oesterheld and his brother in 1957.[1] The publisher was Editorial Frontera.[1] It was part of the Golden Age of Argentine Comics.[1] The most successful of its published series was El Eternauta. The final issue of Hora Cero appeared in 1963.