The inscription in Spanish: title of state on the lower arch. In the center: Common Rhea bird.

The American Rhea (Rhea americana), also known as the Gray, Common, or Greater Rhea is not only the largest species of rhea but the largest American bird, with adults averaging 30 kg.

The symbol of austral, below - face value, the year of minting.

The austral (the symbol was an uppercase A with an extra horizontal line), replaced the peso argentino at a rate of 1 austral = 1000 pesos.