Watch List notes:

THRACE, Mesambria. 4th century BC. AR Diobol (10mm, 1.24 g). Helmet facing / Ethnic within spokes of wheel; radiating lines around. Karayotov I 39–140; Topalov, Messambria 9; SNG BM Black Sea 268–71. VF, toned, some granularity.

From the Patrick H. James Collection. Ex Classical Numismatic Group Electronic Auction 287 (26 September 2012), lot 59.