Escudo - Carlos III

Carlos III's monetary reforms of 1772 standardized the escudo series across all Spanish mints simultaneously — Madrid, Seville, Mexico City, Lima, Potosí, and several others — a logistical coordination with no real precedent in Spanish minting history. The reform replaced the older macuquina (cob) coinage that had dominated colonial output for nearly two centuries, imposing milled edges and uniform dimensions empire-wide.

Specimens from the colonial mints, particularly Lima and Potosí, show measurably inconsistent gold fineness despite official mandates, a known problem that Spanish crown assayers documented repeatedly through the 1770s.