Vintage concentric passage door knob set made of brass with a polished brass finish. The manufacturer is unknown. Priced as two door knobs, two rosettes, and a spindle. Good condition with surface wear from prior use. One available. The manufacturer and exact date of creation are unknown. The dimensions are Knob 1.875 in. diameter x 2.125 in. D, rosette 2 in. diameter x 0.375 in. D.