Watch List notes:

Sicily. Messana. The Mamertinoi. AE Unit, c. 288-278 BC. Obv. ΑΡΕΟΣ. Laureate head of Ares right; helmet behind. Rev. ΜΑΜΕΡΤΙΝΩΝ. Eagle standing left on thunderbolt. HGC 2 870. AE. 8.91 g. 21.50 mm. R. Rare denomination. Delicate green patina. Good VF.