Sorry but you have not given us enough information. I suggest you go to the "Frequently Asked Questions" section of the "Bell Talk" Forum and read the section about what information is needed in order for people to give you information about your bell. Please remember that the forum responses are all personal opinions of the writers and do not represent official information from the American Bell Association.
Also, what makes you think this is a ship's bell? This is where a picture of the bell would help.
Member of the American Bell Association since 1965