Watch List notes:

Sicily, the Mamertinoi Æ Quadruple. Messana, circa 288-278 BC. Laureate head of Ares to right; APEOΣ before, helmet behind / Eagle standing to left on thunderbolt; MAME[P]TINΩN around. SNG ANS 402; Särström Series II, Group A, 17–27; HGC 2, 865. 15.15g, 27mm, 12h.

Near Very Fine; chip on obverse, pleasant green patina.

From the inventory of a European dealer;
Ex Roma Numismatics Ltd., E-Sale 84, 16 June 2021, lot 100.