SEVERUS ALEXANDER AR silver denarius. Rome, 222 AD. IMP C M AVR SEV ALEXAND AVG, laureate, draped bust of Severus Alexander right, seen from behind. Reverse - MARTI PA-CIFERO, Mars standing facing in military dress, helmeted head left, olive branch in outstretched right hand, grounded spear in left. RIC IV.II 160. 19mm, 3.0g.