This is a BRYANT 2-light socket from the early 1900s. The patent date is "MAY 17.1904". It is made of brass and ceramic at the top, and has a good weight. It is a pull-chain type, but only turns one light on and off. The size is E26 screw-in type, and it has been tested and is working. We are releasing rare antique sockets, so please take a look at our other items if you like.