1900s Sargent Steel Passage Door Knob Set

These antique eight fold door knobs were made by Sargent in the 1901 catalog. They are part of the K-31100 'RD' Design. The back plates are made of steel in a rectangular shape with a beaded design. The original mounting screws are not available. Good condition with surface wear and rust from prior use. Priced as two door knobs, two back plates, and a spindle. Priced each. The manufacturer and exact date of creation are unknown. The dimensions are Knob 2.25 in. diameter x 2.375 in. D, plate 7 in. H x 2.25 in. W x 0.375 in. D, drop 2.25 in.