Large sestertius of Postumus (259-268 AD) w/ship, Lugdunum mint

IMP C M CASS LAT POSTVMVS PF AVG on obv., Postumus facing right / LAETITIA, Prow of a ship on waves w/5 rowers AVG underneath. 27mm, 12.1g. Lugdunum mint, RIC 143.