Priapos, Mysia. 300-200 BC. AE 10mm; 1.05 gr. 

Obv: Laureate head of Apollo right. 
Rev: PRIA beneath shrimp or crayfish left. Symbol (?) above. 

SNG von Aulock 7525. 
Very scarce.

Courtesy of Münzen & Medaillen GmbH (DE), 17, 787. 2005