Watch List notes:

THRACO-MACEDONIAN TRIBES, Derrones. Circa 480-465 BC. Diobol (Silver, 18 mm, 1.17 g, 8 h). Bull standing left, head turned to look back; above, floral pattern. Rev. Crested Corinthian helmet. HPM -. Cf. SNG ANS 934. Rare and quite unusual. Very fine.
From the Orca collection, USA.