40 Reis - João VI Bahia mint

João VI issued copper coinage for Brazil from the Bahia mint during a politically volatile stretch — he had returned to Lisbon in 1821 under pressure from the Liberal Revolution in Portugal, leaving his son Pedro as regent in Rio de Janeiro. The Bahia mint continued striking in his name through 1822, the very year Pedro declared independence. Coins bearing João VI's authority were thus being produced in Brazil while the political ground shifted entirely beneath them.

The KM#E1 designation flags this as an essai or pattern classification in some references, though Gomes treats survivors as regular issues.