Severus Alexander, AE Sestertius. AD 223. 

IMP C M AVR SEV ALEXANDER AVG, laureate, draped and cuirassed bust right.
PONTIF MAX TR P II COS PP, SC in ex, Securitas seated left by 
altar, holding sceptre and supporting her head on her left hand. 

RIC 407; Sear 8007; Cohen 463.

With permission of cngcoins.com, mailbid sale, 2005.