Watch List notes:

Sicily, Messana. The Mamertinoi, c. 288 BC. Æ Double Unit (23mm, 8.81g, 1h). Laureate head of Zeus r.; thunderbolt behind. R / Bull butting l.; [Φ] above. CNS I, 6; SNG ANS -; HGC 2, 866. Rare, dark patina, about VF