Greek Ring with Thunder Bolt

6th century BC. A bronze ring with lentoid-section hoop and ellipsoidal bezel, bearing engraving of a thunder bolt; early type. 1.14 grams, 20.75mm overall, 17.63mm internal diameter (approximate size British N, USA 6 1/2, Europe 13.72, Japan 13) (3/4"). From a central London collection; previously in a European collection formed 1979-1989. [No Reserve]
Condition Report: Fine condition.