Claudius II AE Antoninianus. Rome. 

IMP CLAVDIVS AVG, radiate, cuirassed bust right.
AEQVITAS AVG - Aequitas standing left, holding scales and cornucopiae.

RIC V-I, 15.

Note - this type was also minted in Siscia, but the M of IMP. engraved as IIII was a characteristic of the Rome mint.

Image courtesy of the ANS New York.