Watch List notes:

Thessaly, Magnetes. Ca. 150-130 B.C. AE chalkous (14.4 mm, 2.95 g, 5 h). Bust of Artemis left, hair in a bun, quiver over her shoulder / MAΓNHTΩN, Poseidon standing left, holding dolphin and trident. BCD 1183 var (no palm branch to left); Rogers 330-333 var; SNG Cop 164 var. Fine. Rare. 

Ex BCD collection with his round tag.