Marcus Aurelius (161-180). AR Denarius. Rome mint, 172 AD. Obv. M ANTONINVS AVG TR P XXVI. Laureate head right. Rev. IMP VI COS III. Mars, helmeted, in military dress, standing right, holding inverted vertical spear in right hand and resting left hand on round shield set on ground. RIC III 261; RSC 290. AR. 3.38 g. 18.50 mm. Good VF.