original 19th century ornamental cast brass "chevron" pattern residential entrance doorknobs and matching backplates

hard to find ornamental cast brass drum-shaped doorknobs and matching entrance door backplates designed and fabricated by the norwich lock mfg. co., norwich, ct. the vestibule door residential hardware contains a distinctive chevron design or pattern. the c. 1880's entrance door hardware is comprised of cast brass with a mostly uniform surface patina.