Thrace, Thasos. AR Obol, 0.38 g. - 6.19 mm. Circa 500-480 BC. Obv.: Dolphin swimming to left; two pellets below. Rev.: Rough incuse square. Ref.: HGC 6, 338 var. (same); CNG Mail Bid Sale 73 (2006), lot 107. Fine, Rare.