matching set of early 20th century antique american interior passage door "mantua" pattern doorknob backplates or escutcheons designed and fabricated by the p. & f. corbin co., new britain, ct. the decorative backplates are comprised of stamped steel with traces of the original copper-plated finish. the original thimbles are tightly affixed to the backside of the doorknob escutcheons. measures approximately 9 x 2 1/2 inches. priced for the pair.