Seleukos I Nikator
Tetradrachm (Silver, 26 mm, 17.08 g, 8 h)
Susa, circa 296/5-281.
Laureate head of Zeus to right. Rev. BAΣIΛEΩΣ / ΣEΛEΥKOΥ Athena, brandishing spear overhead in her right hand and holding shield in her left, standing right in quadriga of elephants moving to right; above to right, spearhead; before elephants, monogram of MΩ. SC 177.2.

The Seleukid Kingdom was founded by Seleukos I Nikator and continued by his son Antiochos I Soter. It was the largest of the post-Alexander kingdoms, though over time they lost more and more territory to rebellious client kingdoms and invasions, until they were eventually defeated entirely and swallowed by Rome.

Seleukid Empire, Antiochos I Soter AR Tetradrachm
Seleukeia on the Tigris, 281-261 BC
Diademed head to right / Apollo Delphios seated to left on omphalos, testing arrow and resting left hand on grounded bow; ΒΑΣΙΛΕΩΣ to right, ΑΝΤΙΟΧΟΥ to left, monogram to outer left and right.
SC 379.5a; HGC 9, 128g. 16.80g, 29mm, 3h.