Obverse is slightly off-center but has very good detail
Obv : Laureate head of bearded Janus with I above
Rev: Prow of galley right with the inscription Q MARC (MA in monogram) above, LIBO before and ROMA below
Sear 724 / RRC 215/2a / CRR 396
Bronze, 23.0 grams, 29.7 mm