Pergamon, Mysia. AR diobol, civic issue, 310-284 BC. 12mm, 1.36 g. 

Head of Herakles right, wearing lionskin headdress.
PERGA, cult image of Pallas Athena (the palladium) 
standing facing, holding spear and shield. Thunderbolt in right field.

SNG France 1558; Paris 1032. 

With permission of cngcoins.com, auction 288, Lot 198, Oct 2012.
(Note: SNG France cites Paris 1052 in error)