Tetradrachm - Seleukos III Keraunos Seleucia on the Tigris

Seleukos III reigned for less than three years before being assassinated — most likely poisoned — by members of his own army during a campaign in Asia Minor around 222 BC. His brief rule produced a limited coinage, and issues attributed to Seleucia on the Tigris, the administrative heartland of the eastern empire, are among the scarcer mint attributions within his already restricted output. SC 939.1 places this piece within a tightly defined die study by Houghton and Lorber, who assigned mint attributions largely on the basis of control marks and die links rather than explicit mint signatures.