| Province | Paphlagonien |
| City | Sinope |
| Size (mm) | 30 |
| Weight (g) | 13.5 |
| Die Axis | - |
| Tariff | - |
| Governor | - |
| Ob. Leg. | M OPEL DIAD[OVMENIANOC] CAES |
| Ob. Desc. | Bare headed and draped bust right |
| Meaning | Marcus Opellius Diadumenianus, Caesar |
| Rev. Leg. | [CIF] SINOPN [...] | Rev. Desc. | Serapis standing left, right hand raised, holding sceptre in left | Meaning | - | References; | Collection; unpublished | Notes: | Possibly CCLXI as the last letters on the reverse |