Roman Republic AE Semis. L. Licinius Murena Semis ca 169-158 BC, 11.47 g. 

Laureate head of Saturn right, S behind head.
MVRENA above prow right, S in right field, ROMA below.

Babelon Licinia 2; Sydenham 373a. Crawford 186/2. 

Very rare. 
Estimate: 300 CHF.

With permission of Numismatica Ars Classica, Oct 2011