Watch List notes:

BITHYNIA, Kios. Circa 345-315 BC. AR Half Siglos – Hemidrachm (12mm, 2.49 g, 12h). Proxenos, magistrate. Head of Apollo right, wearing laurel wreath; KIA below / Prow of galley left, decorated with star; ΠPOΞ/ENOΣ above and below. RG 2; HGC 7, 553. Iridescent tone, slight die shift on reverse. EF.

From the North River Collection. Ex Triton XVI (8 January 2013), lot 417; Classical Numismatic Group 85 (15 September 2010), lot 388.