Dichalkon

Mesembria — modern Nesebar on Bulgaria's Black Sea coast — was a Dorian colony founded by settlers from Chalcedon and Megara, and its bronze coinage emerged as the city consolidated independent economic activity along the western Pontic trade corridor. The dichalkon denomination itself reflects a fractional bronze system calibrated to small-transaction commerce, likely tied to the fish-salting and grain trade that made Pontic colonies economically viable in the first place.

SNG Copenhagen 654 remains the standard reference point for attribution, with the type well represented in Bulgarian hoard material from the region.