Made of cast brass. The knob was made by Enoch Robinson in the 1875 catalog. It is part of the E-15410 group. The plate was made by Yale & Towne. Good condition with appropriate wear from age. Priced as one door knob and one back plate. Please contact our hardware sales team to help you complete this into a set. Knob 2.25 in. Diameter x 2.375 in. D, plate 9 in. H x 2.25 in. W x 0.375 in. D, drop 2.5 in. Collar 0.625 in. Small items under 5 lb. No larger than 12 in. Medium-sized items 5 lb. No larger than 30 in. Processing time may take up to 1-2 weeks, depending on the original location. Please send pictures to verify the damage.