This Vernacular style bronze door knob set was made by Norwich Lock Mfg. Co. in the 1882 catalog. It is part of the H-21920 group. Priced as two door knobs, two back plates, and a spindle. Good condition with appropriate wear from age. One available. The dimensions are Knob 2.125 in. diameter x 2.25 in. D, back plate 5.0625 in. H x 1.625 in. W x 0.125 in. D, collar 0.5 in. diameter, drop 2 in.