L. Mamilius AE Semis ca AD 189-180, 14.05 g. 

Laureate head of Saturn right, S behind head.
Prow right; S and Ulysses holding staff in left hand above, ROMA upwards to right, L MAMILI below. 

Babelon Mamilia 2. Syd. 369a. Cr. 149/2b.
Very rare. 
Estimate: 250 CHF.

With permission of Numismatica Ars Classica, Oct 2011