group of three matching 19th century antique american ornamental cast iron oversized interior residential passage door keyplates possibly fabricated by the p. & f. corbin co., new britain, ct. the matching backplates contains a brushed metal finish sealed with a clear coat lacquer. each passage door keyplate contains screw holes above and below the centrally located skeleton keyhole opening. priced for the lot of three. measures 1 x 2 1/4 inches.