Watch List notes:

Sicily. Messana. The Mamertinoi. AE 15 mm, c. 2nd century BC. Obv. Head of Ares right, wearing Corinthian helmet. Rev. MAMEPTINΩN. Kithara; to right, monogram. HGC 2 886; CNS I 38; Buceti 36; Särström Series XV, Group E, 298-300. AE. 2.63 g. 15.00 mm. RRRR. Extremely Rare; seemingly no other examples on CoinArchives, for another specimen see Roma Numismatics E-Sale 79 (2021), lot 39. About EF.