Commodus (177-192).     AR Denarius, Rome mint, 188 AD.   Obv.    M COMM ANT FEL AVG BRIT. Laureate head right.        Rev.   P M TR P XIII IMP VIII COS V P P. Salus seated left, feeding out of patera serpent rising from altar to left.     RIC II-p. 1 (2nd ed.) 169; RSC 544.     2.66 g.   17 mm.          VF.