Onkia

Cephaloedium — modern Cefalù, perched on Sicily's northern coast — was a Siculo-Punic settlement that shifted between Carthaginian and Roman spheres of influence across the third century BC. By the time this onkia was struck, the city had been under Roman control following the First Punic War, yet continued issuing its own bronze coinage, a privilege Rome extended selectively to cooperative Sicilian communities as a practical concession to local exchange needs.

The onkia as a denomination represents one-twelfth of an as in the Sicilian bronze weight system.