Greek Italy. Uncertain Central Etruria. Incuse Centesimal Group. AE 30-Units, late 4th-3rd century BC. Obv. Bearded head of Hercle right, wearing lion skin; behind, traces of mark of value XXX. Dotted border within wreath. Rev. Incuse sting-ray swimming right; border of wawes. Vecchi EC p. 332, series 5; HN Italy 80. AE. 14.49 g. 27.50 mm. RRR. Extremely rare. Superb deep emerald-green patina. VF/F. Ex Artemide LVI, lot 6.