50 Pesos Central Bank Anniversary

Issued to mark the fiftieth anniversary of Argentina's Banco Central, founded in 1935 under President Agustín Justo with significant technical assistance from the Bank of England's Otto Niemeyer. The timing of this commemorative is grimly ironic: 1985 was the year Argentina introduced the austral to replace the collapsing peso, cutting three zeroes from the currency as annual inflation approached 700 percent.

The denomination itself — 50 pesos — was already functionally worthless by the time these pieces reached circulation.