Severus Alexander Denarius 223 AD, Rome,

IMP C M AVR SEV ALEXAND AVG, laureate, draped bust right.
P M TR P II COS P P, Mars standing left, holding branch and reversed spear. 

RIC IVii, 23; Cohen 231; BMC 93

Contributed by Dr. Hubert Lanz, auction November 2000, 
Added July 2011.