two matching original 19th century antique american copper-plated wrought steel "ceylon" pattern interior residential doorknob backplates fabricated by the p. & f. corbin co., new britain, ct. each stamped metal backplates contains a wrought steel thimble, keyhole and two screw holes. very popular design pattern used throughout the late 19th and early 20th century. measure 5 1/2 x 1 1/2 inches. priced for the set.