GREEK Thrace, Mesembria. (Circa 420-320 BC). Diobol Silver (10.8mm 1.14g) Crested Corinthian helmet facing / Radiate wheel with four spokes containing: M-E-T-A. SNG Stancomb 220; Karayotov 1994, 13-130; Traité II.4, 1654; HGC 3.2, 1561.