1/4 Decimo 'Cuartillo', United States of Colombia

Colombia's fractional silver coinage of this period was a direct consequence of the 1863 Rionegro Constitution, which established a federalist republic of nine sovereign states and necessitated a new monetary framework. The cuartillo filled a genuine gap in everyday commerce — smaller than any other circulating silver piece — and was struck across multiple decades despite the chronic instability of federal finances and repeated disputes between Bogotá and the state governments over mint authority.

The low silver fineness of .666 reflects deliberate policy: keeping bullion content below face value to discourage melting, a persistent problem with higher-grade fractional coins in the region.