Ahira (Archivo Histórico de Revistas Argentinas), is an interesting project that makes freely and freely available to the public digitised collections of magazines and periodicals, with their complete indexes, and access to the critical articles that have them as a reference. A good part of these publications are comics.
If in 2019 they released for free download the first 100 copies of the magazine Fierro, shortly afterwards they digitised all the copies of the Hora Cero supplement. This publication was the seed of the popular series"El Eternauta" by Solano López and H. G. Oesterheld. The latter was repressed by the Argentinean dictatorship in 1977 and assassinated by the military in 1978.
The layout, format (landscape) and part of the content of this magazine is reminiscent of the Spanish magazine"Hazañas Bélicas". Although Hora Cero also published comic strips with plots inspired by historical, police, American western, fantasy and science fiction, or folkloric-nativist episodes.
Here is the chronological list of the 116 magazines with their corresponding PDF download links.
According to ahiRa's description, the first Suplemento Semanal Hora Cero hit the streets on 4 September 1957 as part of Editorial Frontera's constellation of magazines: Frontera (which began circulating in April of that year) and Hora Cero (which came out, monthly, from May).
The popularity of the group would expand, months later (in April 1958), with Hora Cero Extra and with Frontera Extra (from July of that year). Its director, Héctor Germán Oesterheld, had founded the publishing house with his brother, an agricultural engineer, and gave his personal brand to this modest family business, which marked an epoch in the sector, becoming the scriptwriter of almost all the comics.
Different artists of the stature of Hugo Pratt, Francisco Solano López and Alberto Breccia passed through its pages, as well as many others who would fill its pages until the last issue in 1959, although other publications would continue to be launched until 1963.