1 Peso

Salta issued its own provincial currency in the early 1920s well after Argentina's central banking framework should have rendered such notes unnecessary — a reflection of the chronic underdevelopment of the country's interior provinces and the practical difficulty of maintaining adequate federal note circulation at distance from Buenos Aires.

PS2121 is thinly documented in the standard references, and surviving examples are scarce enough that population data remains unreliable. The issuing authority, the province itself rather than a chartered bank, places this outside the more familiar Argentine provincial banking series.