In 1926, the Caja Central de Emisión y Amortización was established to effect the transition of currency issues from private banks to a central bank.
In 1949-1950 Banco Central introduced new notes of reduced size (157 × 68 mm) in denominations of 5, 10, 20, 50 and 100 sucres, and dropped the phrase Pagará al portador á la vista (will pay to the bearer at sight), leaving only the literal counter (i.e., the denomination).