4 Reales

Corrientes was one of the few Argentine provinces that maintained its own currency well into the national period, resisting absorption into a unified monetary system long after most other provinces had surrendered that function. The Banco de la Província de Corrientes operated with considerable independence, and its 1861 issues came at a moment of acute political tension between the province and Buenos Aires — the same friction that had defined Argentine federalism for decades.

The 4 Reales denomination places this squarely in the colonial Spanish accounting system, still in common use in the interior provinces even a generation after independence. Pick's PS prefix signals quasi-governmental or provisional status, which tracks with Corrientes's chronically undercapitalized banking arrangements of the period.