Roman Empire, Carinus, Antoninian

A common example of this issue.

Obverse: a bust of the emperor wearing a radiate crown and armor, facing right; the legend on the rim reads:
IMP C M AVR CARINVS AVG;

Reverse: Aequitas standing facing left, holding a balance and a cornucopia; the legend around the edge reads:
AEQVITAS AVG, with the abbreviation KAZ;