I believe that's the Reserve Long Service and Good Conduct Medal. Awarded for 15 years of service.
The obverse obviously dates the medal to the reign of George VI ('36 - '52) and the ribbon color indicates it was for service in the Royal Fleet Reserve.
The inscription reads DIUTURNE FIDELIS (Faithful Over Time).
The obverse obviously dates the medal to the reign of George VI ('36 - '52) and the ribbon color indicates it was for service in the Royal Fleet Reserve.
The inscription reads DIUTURNE FIDELIS (Faithful Over Time).
























