This aes grave depicts the bearded, two-faced god Janus on the obverse and the prow of a Roman warship on the reverse. Janus was among the oldest gods of the Roman religious tradition, associated with beginnings, transitions, doorways, and passages. His two faces, looking in opposite directions, are connected with entrances and departures, while his shrine in the Roman Forum held particular significance in Roman public life. According to tradition, its doors stood open during times of war and were closed when Rome was at peace.

The galley prow on the reverse is often associated with Rome's emergence as a major naval power during the First Punic War (264–241 BC). Rome had constructed large fleets to challenge Carthaginian control of the western Mediterranean. Although the precise reason for the adoption of the prow design remains uncertain, its appearance on Roman bronze coinage followed Rome's naval successes during the war. The combination of Janus and the prow became the standard design of the Republican as, continuing long after these massive cast bronze coins were replaced by smaller struck issues.