matching pair of antique china electric pendant light/lamp sockets w/ beaded pull chain switches

Matching pair of old, turn-of-the-century vintage, white ironstone porcelain light sockets for architectural pendant lights. These have nickel or chrome bead pull chain switches. These two vintage light bulb sockets are marked "P & S" (Pass & Seymour). The socket is for a standard Edison lightbulb base (the same base that is used in lamps and lighting fixtures today).

They are in very good vintage condition, still with the original insulators in the pull chains.