Commodus, AE As. Rome, AD 189. 25.4 mm, 11.24 g.

M COMM ANT P FELIX AVG BRIT, laureate head right.
OPTIME MAXIME around, COS V PP below, Jupiter naked but for 
chlamys hanging behind from both shoulders, standing left, 
holding thunderbolt and sceptre, eagle at foot left. S-C across fields.

RIC 553A; Cohen 388; BMCRE 613 (this coin).

Image courtesy of the British Museum.