Severus Alexander. AR heavy denarius. 4.35 g. AD 225.

IMP C M AVR SEV ALEXAND AVG, laureate, draped bust right.
PM TR P IIII COS II PP, Aequitas standing left, holding 
scales and cornucopiae.

RIC 51 corr. (rev. legend); Noury Bey 2043 (this coin), (Cahn auction 60, 1928.
The Cahn catalog has a clear COS II, but RIC, citing this coin, omits the II.

Image from the Cahn auction.