Numerian AE Antoninianus. Siscia mint, 283-284 AD. 

IMP C NVMERIANVS P F AVG, radiate, cuirassed bust left
FIDES EXERCIT AVGG, Fides seated left, holding standard in each 
hand, another standard behind, 
Gamma in left field. 
Mintmark SMSXXI. 

Unpublished with bust left.
Cohen 15 var; RIC V-2, 460 var.

With permission of cngcoins.com, Jan 2010.