1 Peso

Argentina's monetary situation in the late 1950s was under severe strain — Perón's removal in 1955 left the incoming Aramburu government inheriting a peso that had lost roughly 70% of its value against the dollar in under a decade. The shift to nickel-clad steel for this issue reflected not a design decision but a treasury one, as silver had long since been abandoned and even cheaper alloys were being evaluated for circulation coinage.

The Casa de Moneda facility in Buenos Aires produced this type across five years of political turbulence, spanning two presidencies and the Frondizi government's fraught relationship with the IMF.