100 Colones

The American Bank Note Company printed Costa Rican currency through most of the twentieth century, and by the late 1980s the relationship was nearing its end — ABNC filed for bankruptcy in 1990, which makes notes from this final window of production the last the company ever supplied to the Banco Central. The printer's imprint appears in the lower margin, as it had for decades.

Security thread adoption in Costa Rica's paper currency accelerated during the 1980s as counterfeiting pressure increased across Central America, and this series reflects that transition — earlier printings of the 100 Colones relied on the watermark alone.