100 Libres Project for Mercosur Common Currency

This is a design proposal, not an issued note — one of several concepts circulated during the mid-2000s to early 2010s discussions about a potential Mercosur common currency, provisionally called the "Sucre" or, in some proposals, the "Libre." Brazil's participation in those discussions was always cautious; the Central Bank never formally committed to a shared currency framework, and no Mercosur monetary union has materialized.

Nascimento's project exists in the collector market as a specimen or presentation piece, not a circulated instrument. Its interest is purely documentary — a paper artifact of regional monetary politics that went nowhere.