Watch List notes:

BITHYNIA, Kios. Circa 345-315 BC. AR Half Siglos or hemidrachm (13mm, 2.46 g, 12h). Persic standard. Poseidonios, magistrate. Laureate head of Apollo right / Prow of galley left; ΠO-ΣEIΔΩ-[N]IOΣ above and below. RG 3; HGC 7, 553. Deeply toned, light porosity. VF.