ROMAN REPUBLICAN, L. AEMILIUS LEPIDUS PAULLUS SIVER DENARIUS

Roman Republic
Q. Marcius Libo Silver Denarius (148 B.C.)
Rome mint
Obverse: Helmeted head of Roma to right; mark of value (X) below chin, LIBO downwards behind
Reverse: The Dioscuri riding to right; Q•MARC below horses, ROMA in exergue. 
RCV90; Marcia.
3.6 grams, 20 mm in diameter.