4 Reales Plata Boliviana

San Luis was one of several Argentine provinces that briefly experimented with locally issued paper money in the early 1870s, a period when the national banking framework was still too underdeveloped to supply adequate circulating medium to interior provinces. This note draws its denomination from the old colonial silver unit — plata boliviana — which remained the informal reference currency across the Argentine interior long after independence, simply because Bolivian silver coins were still the most trusted metal in circulation there.

Provincial treasury issues from San Luis are among the scarcest of the series. The province had a small population and limited commercial activity, meaning original print runs were modest and redemption was often incomplete.