Holds candle or some other light source. Trim Indicator for 580 Foot Ship Amazingly rare navigational instrument. Mahogany case with small thermometer mounted above diagonal scale. Accurate Age Unknown. 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.