1/2 Unit

Kastilo — modern Cástulo, near Linares in the upper Guadalquivir valley — was one of the most significant mining centers in the ancient Iberian Peninsula, its silver and lead deposits exploited heavily under both Carthaginian and Roman administration. This fractional bronze issue falls within the city's late autonomous coinage, produced during a period when Hispanian civic mints were gradually losing independent monetary authority as Rome tightened administrative control following the Sertorian War.

The ACIP classification places this piece among the final generations of Iberian-script coinage from the region, before Latin legends became obligatory.