Severus Alexander AR plated antoninianus. AD 222-235. 3.75 g.

IMP C M AVR SEVE ALEXAND AVG (sic), radiate, draped and cuirassed bust right.
MARS VICTOR, Mars, naked, walking right, holding trophy over shoulder and spear.

RIC 157 note; Noury Bey 2042 ((Cahn auction 60, July 1928); RSC 156c. 

With permission of Gorny & Mosch auction 156, Lot 2244, March 2007.