2 Soles

The Banco Nacional del Perú operated in Tacna under genuinely complicated circumstances. Tacna was occupied by Chile from 1880 following the War of the Pacific and remained under Chilean administration until 1929 — meaning any note issued from the Tacna branch existed within a territory whose political status was actively disputed for decades. Whether this note circulated freely alongside Chilean currency or served a more localized function is unclear, but the geographic designation itself places it at the center of one of South America's most protracted post-war territorial disputes.