Severus Alexander Denarius. 229 AD. 

Obv: IMP SEV ALEXAND AVG, laureate head right
Rev: P M TR P VIII COS III P P, Mars advancing left, 
holding branch, spear and shield.

RIC 92, RSC 365, BMC 603, Sear 7907

Used with permission of TimeLine Originals (www.time-lines.co.uk)
July 2009