This is an original British Convoy bulk head ship light. I believe WW 2 era. The glass globe has been replaced as well as the bulb socket with a Leviton socket. It measures 11" from the top of the hanger to the bottom of the cage and 13" to the bottom of the hanger. The top piece is 5" in diameter and the cage is 5". The bottom hanger is a little bent. There are some hand cut gaskets installed on top of the glass globe. The top is stamped S & A for the manufacture.