5 Pesos Admiral G. Brown

Guillermo Brown — Irish-born, raised in Philadelphia, and eventually the founder of the Argentine Navy — died in 1857, but his coinage appearances track closely with Argentine naval ambitions and periodic nationalist revivals. This 1977 issue appeared under the military junta that had seized power in March 1976, a government that leaned heavily on patriotic iconography while conducting what it called the "Dirty War" against political dissidents.

The aluminium bronze alloy was adopted partly in response to chronic metal cost pressures that plagued Argentine coinage throughout the 1970s inflation cycle.