Mamertini, Sicily. 288-278 BC. AE Unit. 17.11g; 26mm. 

Obv: AREOS to right of laureate head of young Zeus right
Rev: (from top right) MAMER-TINWN, eagle standing left 
on thunderbolt. 
No symbols in field.

Sarstrom 17-42; SNG Cop 433 ff; BMC 3.

With permission of Roma Numismatics, January, 2010