50 Bolivianos

Banco Nacional de Bolivia operated as a private commercial bank, one of several regional issuers that functioned in Bolivia before the establishment of a central bank. The Cobija branch designation is notable — Cobija was Bolivia's only Pacific port at the time, making it a hub for rubber and quinine trade before the War of the Pacific (1879–1884) stripped Bolivia of its coastal territory entirely. Notes issued from that branch reflect a window of commercial activity that closed permanently within a decade.

American Bank Note Company produced the plates in New York, as was common for South American private bank issues of this period. The S-prefix reference confirms this as a state or private bank issue rather than a government obligation.