Watch List notes:

SICILY, Messana. The Mamertinoi. 211-208 BC. Æ Pentonkion (26mm, 3h). Laureate head of Zeus right / Warrior, holding spear and shield, advancing right; Π (mark of value) to right. CNS 41; HGC 2, 853. Deep green patina with light earthen deposits. In NGC encapsulation 5872733-009, graded Ch F.

From the Robert W. Bartlett Bequest Sold for the Benefit of the American Numismatic Society, purchased from Riverside Stamp & Coin, Riverside CA, February 1981.