Watch List notes:

Sicily, Akragas, c. 495-480/78 BC. AR Didrachm (18mm, 8.55g, 12h). Sea eagle standing l. R/ Crab; below, helmet r.; all within shallow incuse circle. Cf. Westermark, Coinage, Group III, 224 (O78/-); HGC 2, 94. Very Rare variant with helmet r. Some roughness, near VF