1 Lempira

Banco Atlántida was a private commercial bank operating in Honduras, and its notes issued under government authorization circulated as legitimate currency during a period when the Honduran state lacked the infrastructure to monopolize paper money production. The American Bank Note Company printed for dozens of Latin American issuers simultaneously, but the S121 series is notable for being among the last private bank issues before Honduras consolidated currency authority under the Banco Central, established in 1950.

Surviving examples from 1932 are scarce — not because of high circulation, but because private bank notes were aggressively retired and destroyed once central banking took hold.