Antique Miner's Cap Lamp. Used to illuminate in coal mines these lamps burned oil, or a mix of fat and oil, through a wick pulled through the spout.
Heavy metal construction, possibly tin, I'm not sure. Includes cap, with a star pattern and crude hook on a small length of chain.
These were created in Scotland in 1850 and used up to 1920 there and in the US.
About 8" tall and 6" wide. Weighs 1.2 lbs.