| Province | Bithynia |
| City | Prusa ad Olympum |
| Size (mm) | - |
| Weight (g) | 8.29 |
| Die Axis | - |
| Tariff | - |
| Governor | - |
| Ob. Leg. | M OPE ANT DIADOVMENIANOC KAI |
| Ob. Desc. | Bare headed and draped bust right |
| Meaning | Marcus Opellius Antonius Diadumenianus |
| Rev. Leg. | P ROV-C-AEWN | Rev. Desc. | Poseidon std. right with left foot raised on rock, trident in right hand, dolphin in outstretched l. hand | Meaning | (coin) of the people of Prusa- Honouring the god of the sea and of horses | References | Gorny & Mosch Giessener Münzhandlung, Auction 147. No.1827, (illustrated with permission); Sear 2992 citing B.M.C. 13.198.26, | Notes: |