Stater

Amastris was a Pontic city with an unusually documented founding — it was consolidated around 300 BC by its namesake, Amastris of Heraclea, a niece of Darius III who had married and been divorced by Lysimachus. She merged four smaller settlements into a single polis and issued coinage to assert civic identity. She was drowned by her own sons not long after, and Lysimachus had them executed in turn.

The stater series referenced in HGC 7#356 falls squarely in the post-founding generation, when the city had passed to Pontic control under Ariobarzanes and his successors.