Roman Republic L. Sempronius Pitio As, AD 148, AE 22.59 g. 

Laureate head of Janus; mark of value "I" between PI–TIO above. 
L·SEMP, Prow right, I to right, ROMA below. 

Babelon Sempronia 3. Sydenham 403. Crawford 216/2a; RBW 923. 

With permission of Numismatica Ars Classica - Auction 61 (RBW coll. sale), Lot 923, Oct. 2011