Unidad de Valor Constante
The Unidad de Valor Constante (UVC) was a currency created by the "Ley de Valores" of Ecuador in 1993, and abolished with dollarization in the presidency of Jamil Mahuad on January 9, 2000. It was meant to help deal with the high levels of inflation experienced under the sucre.
Source: Wikipedia — Unidad de Valor Constante (CC BY-SA 4.0)