lot of antique porcelain shell electric pendant light/lamp sockets w/turn key paddle switches

Lot of two old, turn-of-the-century vintage, electric lamp sockets with white porcelain socket shells and paddle switches. One of the sockets is marked "Arrow" (pre 1927 when Arrow Electric Co became Arrow-Hart & Hegeman) and has a china turn key on the switch. The other lamp socket is marked "Paulding" on the bottom of the china shell and also on the bakelite turn-key.

The sockets are both for a standard Edison base light bulb (developed for the Mazda light bulb and still used in lamps and lighting fixtures today).

They are in very nice vintage condition.