five original 19th century ornamental cast iron interior fisher building office door escutcheons or backplates. fabricated by the yale & towne mfg. co., stamford, ct. the gothic style office door backplates have an older gold enameled finish over the original bower-barff finish. the monogrammed backplates contains the letter "f" encircled within a quatrefoil with fleur-de-lis accent. the fisher building was, at the time of its construction, one of the tallest buildings in the world and was erected almost entirely without masonry. with the revolutionary use of steel framing, the building load was transferred to the internal steel structure. terra cotta was used as the exterior sheathing, it was a much more versatile and lighter material than brick. influenced by gothic french cathedrals, d.h. burnham designer/architect charles atwood used the salmon colored terra cotta to mold features that clearly distinguished the fisher building from other chicago school buildings in the area. the aquatic motif of fish, shells and crabs is a whimsical tribute to the owner, mr. fisher. measure 9 3/4 x 2 5/8 inches. priced for the lot of five.