A user pointed out that this is a steamship
The image above says
C4-8 or СЧ-В (As another user pointed out, it could be Cyrillic since I am Russian)
m (pentagon) 875 (or м in Cyrillic)
e:added last picture.
try asking in /r/whatisthisthing, they have a better track record with this sort of request.
Also, when you post there, please take better pictures, using a real camera, not a phone, and prop both ring and camera on a stable, non-moving surface (like a tabletop), so there is less blurring.