Roman Republic, Anonymous, 169-158 BC. AE Quadrans (19mm, 3.78g, 4h). Rome. 

Head of Hercules right, wearing lion-skin headdress; three dots behind. 
Prow right; star before, three dots below. 

Crawford 196/4; Sydenham 264d. 

With permission of London Ancient Coins, Sept 2011.