Potin Unit Curved Bull / Holman B1

The Cantii occupied the territory now roughly corresponding to Kent, and their potin coinage is among the earliest struck — or more precisely, cast — money produced in Britain. Potin, a tin-rich bronze alloy, was used across southern Britain and northern Gaul for low-denomination exchange before the Roman conquest made such local issues obsolete. The casting process rather than striking distinguishes these from later Celtic coins entirely.

Holman's classification system, built from a corpus assembled over decades, places this B1 variety at the beginning of the sequence — the earliest recognizable Cantian type.