original and intact c. 1950's fully functional single electric light wall-mount "explosion proof" sconce designed and fabricated by the appleton electric company, chicago, il. the oversized unilet was savaged from the a. finkl & sons chicago foundry complex undergoing demolition. the single oversized sconce retains the original impact-resistant threaded end clear glass jar surrounded by a detachable cage. the 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. measures 6 1/2 inches in diameter x 12 3/4 high.