100 000 Soles Francisco Bolognesi

Peru's late-1970s gold coinage was driven partly by the military government's need for hard currency and partly by nationalist commemoration — Bolognesi, the artillery colonel who died at the Battle of Arica in 1880 refusing Chilean demands to surrender, had become one of the most politically useful heroes in the Peruvian canon. The 100,000 Soles denomination was essentially notional; by 1979, inflation had so eroded the sol that the face value bore no meaningful relationship to either purchasing power or bullion content.

The weight of 31.1035 g is a troy ounce exactly, signaling this was designed for the international bullion market as much as for domestic commemoration.