Watch List notes:

GENS MARCIA. Denarius. (Ar. 3.37g / 19mm). 148 BC Rome. (FFC 848; Crawford 215/1). Anv: Head of Rome on the right, in front of X, in back legend: LIBO. Rev: The Dioscuri on horseback to the right, above stars, below legend: Q MARC, in exergue: ROMA. VF.