vintage american industrial fully functional single electric light ceiling-mount "explosion proof" pendant designed and fabricated by the appleton electric company, chicago, il. the oversized unilet was savaged from the cab or elevator car housed within an a. finkl & sons foundry building. the single oversized sconce retains the original impact-resistant threaded end clear glass jar surrounded by a detachable cage. he single porcelain or ceramic socket is fully functional. the unilet socket housing contains multiple threaded openings for mounting with steel pipe in several various configurations. the threaded plug used to seal off the unused openings remain intact. great overall condition. original gunship or battleship gray enameled finish. measures 9 inches high x 4 3/4 inches in diameter.