Caracalla AE Sestertius 30 mm. Rome, AD 212.

M AVREL ANTONINVS PIVS AVG BRIT Laureate head right.
PM TRP XV COS III PP SC, Helmeted Mars standing left, 
holding victory in right hand and resting left
hand on shield, spear against left arm : at feet, left, captive seated.
S-C across fields.

RIC 490 var (consular year); Cohen 198 var (same). (RIC lists only COS IIII for this reverse and obverse.). Merzbacher auction 1910 ("General S.F.H." Collection), lot 1909.