Roman Republic Struck Coinage C. SAX. series As, Central Italy circa 169-158, AE 22.51 g.

Laureate head of Janus, I above.
Prow of galley right, SAX above, I before, ROMA below. 

Crawford 180/1; Sydenham 361; Babelon Clovia 1. 

With permission of Numismatica Ars Classica auction 61, Lot 758, Oct. 2011.