six matching american antique early 20th century ornamental heavy gauge steel "ceylon" pattern interior residential doorknob backplates designed and fabricated by the p. & f. corbin co., new britain, ct. the doorknob backplates contained a brushed metal finish darkened with an oil-rubbed bronze enamel. each backplate contains a single skeleton keyhole, screw holes and protruding thimbles. measures 5 1/2 x 1 1/2 inches. priced for the lot.