Mamertini, Messana, Sicily, AE dichalkon. 278-275 BC. 11 g. 

Head of Herakles left, wearing lionskin headdress.
MAMERTINWN, eagle standing right on thunderbolt, wings 
spread, coiled serpent in right field. 
CNG Mail bid sale #58, lot 114.
 
 Lot sold for $250.

With permission of cng.com, Mail Bid Sale 58, Lot 114, Sept. 2001.