orologio en CB01 OFFICIAL. In a house in the Observatorio neighborhood of Córdoba, beneath the facade of a blacksmith shop and the everyday life of a family, a secret was hidden: eight meters underground, a clandestine printing press operated for the PRT-ERP (People's Revolutionary Army). There, they produced El Combatiente and Estrella Roja, publications distributed through an organized network to evade the dictatorship's persecution.