Marcus Aurelius Denarius. Minted in Rome. AD 172.

Obv: M ANTONINVS AVG TR P XXVI, Laureate, cuirassed bust right
Rev: IMP VI COS III, Roma seated left, holding Victory and spear, large shield at side

Reference: BM 557 note. RIC 259 var (not listed with this but type). RSC 280 var.

This coin is not in RIC or RSC with this bust type. 
This denarius seems to be the one with an odd description as  BM 557 note: "laureate, with cuirass on r. shoulder, 
note in B.M."

Contributed by Martin Griffiths, April, 2005.