Antique door knob and back plate fixed unit made of bronze. Made by Gilbert Lock Company in the 1870s. Gilbert hardware is known for the elimination of set screws and spindles. The original mounting screws are not available. Good condition with surface wear from prior use. One available. The dimensions are Knob 2 in. diameter x 1.625 in. D, plate 5.5 in. H x 2.125 in. W x 0.5 in. D, overall 3 in. D, drop 3.125 in.