Tetrachalkon - Demetrios II Nikator uncertain

Demetrios II's first reign was precarious from the start. He retook the Seleucid throne from the usurper Diodotos Tryphon around 145 BC, but within a few years was campaigning in the east against the encroaching Parthians — a campaign that ended in his capture by Mithridates I around 139 BC. The "uncertain" mint attribution for this issue reflects the administrative disorder of that period, when royal coinage was being struck across a fragmented realm with diminishing central control.

Demetrios spent the following decade as a Parthian prisoner, though treated with sufficient dignity to marry a daughter of Mithridates I.