20 Pesos

The Provincia de Buenos Ayres operated its own note-issuing apparatus independently of the Argentine federal government well into the 1860s and 1870s — a consequence of the prolonged constitutional standoff between Buenos Aires province and the Confederation that had only nominally been resolved in 1861. This note was issued under that provincial banking framework, before federalization of the currency system gradually stripped the province of autonomous emission rights.

American Bank Note Company held the contract for much of Buenos Aires' provincial paper at this period. The PS prefix in the Pick reference signals private or quasi-governmental issuer status — this sits outside the main national series entirely.