Estimated to be Circa 1890-1920. Bottom end has lanyard ring for rope lanyard. Probably early 1900s. Battery operated light is activated when round brass ball float causes bulb-end to remain out of water. Gravity causes batteries contacts to complete electrical circuit.
Bottom end has bail ring for rope lanyard.
Probably early 1930s. This port lamp personifies character. Obviously, used on a working boat. The red fresnel lens is intact but mounting piece needs soldering. It has been electrified in an effective, but somewhat crude fashion.