antique paddle switch electric sockets on solid brass arm lights, vintage lighting hardware lot

Lot of five old solid brass arm lights, all with the original paddle switch electrical sockets. The keys are bakelite, I believe? Some have chipping or cracks.

All of the brass is tarnished, but the sockets all look to be in good shape. The arms measure about 6 1/2" long straight out the arm length to the center of the sockets.