Roman Republic, Anonymous AE As, 34mm, 24.23 g. Ca. 179-170 BC. Rome. 

Obv: Laureate and bearded head of Janus. 
Rev: ROMA. Prow of galley right; above, dolphin; I to right. 

Crawford 160/1. 
Estimate: 75 Euro

With permission of Gitbud & Naumann Auction 29, Lot 494, March 2015.