Watch List notes:

IONIA. Phokaia. Circa 521-478 BC. Hemiobol (Silver, 7 mm, 0.30 g). Head of a griffin to left. Rev. Rough incuse square. CNG E-Auction 418 (2018), 276. Cf. SNG Kayhan 514-6 and SNG von Aulock 2116 (for hemidrachms). Rare in this denomination. Struck on an oval flan, otherwise, good very fine.