original antique american salvaged city of detroit emblematic school doorknob with matching backplate

early 20th century detroit board of education administration building office door emblematic hardware comprised of cast iron with original bower-barff enameled finish largely intact. the drum-shaped doorknob features a lightly embossed board of education seal. the unadorned escutcheon contains a single keyhole and four screw holes four mounting purposes. likely fabricated by yale & towne or possibly the sargent hardware company.