Ancient Roman Imperial Coins - Severus Alexander - Mars Denarius. 228 AD Rome mint. Obv: IMP SEV ALEXAND AVG legend with laureate bust right. Rev: P M TR P VII COS II P P legend with Mars standing right resting on spear and shield. RIC 83; BMC 503; RSC 337; Sear 7905. 3.05 grams. ("). Extremely fine.