Tacitus. AE Antoninianus. Siscia.  275-276 AD. 

IMP CM CLA TACITVS AVG, radiate, draped, cuirassed bust right
AEQVITAS AVG, Aequitas standing left, holding scales and 
cornucopiae.

P in right field. 

RIC V (1) 181.

With permission of Roma Numismatics, Oktober, 2009