Caracalla (198-217) AR Denarius (Silver, 3.26g, 19mm) Rome, 213-217.
Obv: ANTONINVS PIVS AVG GERM, Laureate head of Caracalla to right.
Rev: MARTI PROPVGNATORI, Mars advancing left, holding spear in his right hand and trophy over his left shoulder.
Ref: RIC 307.