This is an antique stamped brass knob and plate set in the Mantua pattern by P. & F. Corbin . This set consist of a knob pair, two matching backplates and a plain face Corbin mortise lock. There is a copper finish to the plates and lock face however the knobs have lost their copper plate and show a bronze tone, each doorknob contains a center button surround by filigree and egg & dart border. A reproduction of this item is also available, see related items below. Only one set available.