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Commodus, AE Denarius, (Limes), M COMMODVS ANTON AVG PIVS, laureate head of Commodus, facing right. / TR P VIII IMP VI COS IIII, Minerva, the goddess of wisdom and courage, who guided men in battle, advances right, brandishing a javelin and holding a shield, with an owl at her feet. (cf. RSC 879, cf. RIC III 56, cf. BMC IV 103, (2.0 gm.).)

Limes denarii take their name from the Roman word for frontier ("Limes"), and are now considered to have
been minted by military mints along the Danube border,
using bronze instead of silver.