Bureau of Construction and Repair Specification, 1918
Adapted from, The Naval Articifer’s Manual: Text, questions, and general information for deck articifers in the United States Navy, compiled and arranged by Assistant Naval Constructor (T.) McCall Pate, USN. United States Naval Institute, 1918
For further reading: Wede, Karl. The Ship's Bell: Its History and Romance. New York: South Street Seaport Museum, 1972.
Note: For more detailed information on bell design and manufacturing, researchers should consult Navy records retired to the National Archives and Records Administration.