A replica of a larger Roman coin showing the Port of Ostia. Where did it come from? PS I had to look it up as I am a rookie collector.
It looks like a portrait of Nero on the obverse. All I can make out though, is CAES AVG GERM PM TRP. EDIT: Here it is: Nero AE Sestertius. Lyons mint, 64-66 AD. NERO CLAVD CAESAR AVG GER P M TR P IMP P P, laureate head left, globe at tip of neck / PORT AVG (inverted in exergue) S-C, two curved moles enclosing eight ships in the harbor of Ostia, statue atop lighthouse above, Neptune reclining below. Cohen -. https://www.wildwinds.com/coins/ric/nero/t.html Yours is not real. Definitely a copy.
This. The port of Ostia is one of the most desired sestertii of Nero, or really of Rome. Its a very famous coin that has been copied since at least the Renaissance. Yours is a lesser, not very good, copy OP. The coin pictures by our friend @furryfrog02 might be a six figure coin today, if not at least $50k.