Silver denarius, 20mm, 3.91gm, issued 110/109 BC Rome mint.
Obv: ROMA P·LAECA, Helmeted head of Roma, right.
Rev: PROVOCO, Figure in military dress, left, with right hand raised; on left, figure in toga, gesturing with right hand; on right, attendant with one rod in right hand and two rods in left hand.
References: Sear 178, Cr 301/1.
Reverse depicts a "provocatio", or right of a Roman citizen to appeal a magistrate's decision.