25 Colones

The Banco Central de Reserva de El Salvador maintained a long relationship with the American Bank Note Company through the mid-twentieth century, a common arrangement for Central American issuers who lacked domestic intaglio printing capacity. The 25 Colones denomination sat at the upper end of practical daily use — enough to matter, not enough to be hoarded as a store of value — which means circulated survivors typically show genuine wear rather than the artificial use sometimes seen on higher-denomination specimens.

The watermark remains the sole security feature, a relatively thin line of defense by 1958 standards, when other regional issuers were already adopting security threads.