20 Pesos Plata Boliviana

Banco de Cuyo was one of several provincial Argentine banks authorized to issue notes under the 1854 banking laws that allowed individual provinces to charter their own institutions. Mendoza's geographic position as the dominant commercial hub between Buenos Aires and the Chilean ports gave its bank-issued currency real transactional weight across the Andean trade routes.

The denomination in Pesos Plata Boliviana is telling — by the 1860s, Bolivian silver coinage had become so entrenched as the de facto hard currency in the Cuyo region that local banks denominated paper in it rather than the Argentine peso fuerte. PS#1628 is rare in any condition; Banco de Cuyo ceased operations in the early 1870s when national banking reforms effectively killed the provincial note-issuing model.