L. Mamilius AE Quadrans. ca AD 189-180, 7.59 g. 

Head of Hercules right; ooo behind.
Prow right; RO-MA and Ulysses holding staff in left hand 
above, ooo before, L MAMILI below. 

Babelon Mamilia 4. Syd. 369c. Cr. 149/4a. 
Very rare.

With permission of Numismatica Ars Classica, Oct 2011.
Estimate: 200 CHF.