Severus Alexander. AE Sestertius. 228 AD. 

IMP CAES M AVR SEV ALEXANDER AVG, laureate, draped & cuirassed bust right

P M TR P VI COS II P P, S-C, Mars walking right, carrying 
spear and trophy over shoulder. 

RIC 456; Cohen 308; BMC 415 note.

With permission of Numismatica Ars Classica, May 2012