10 Pesos

Banco de la Unión was one of several private Colombian banks chartered under the 1870 banking law that allowed provincial institutions to issue their own currency. The American Bank Note Company printed for dozens of Latin American clients during this period, and the plates for notes like this one were often partially shared or adapted across different issuers — worth examining closely if you suspect a design relationship with contemporaneous ABNC Colombian issues.

The bank's operating life was cut short by the monetary centralization policies of the 1880s and the turbulence leading into the 1885 civil conflict. Notes from this issuer in any denomination are genuinely uncommon in the market.