1Cast Bronze Door Knob Corbin-118April 18, 2017/in Corbin Hardware, Interior Doorknobs Brass & Iron/by admincirca 1880 cast bronze doorknob by Corbin in the Florence / Dresden pattern E-13400. Knob is an interior doorknob measuring 2-1/8″ in diameter. Knob in nice original condition and takes a 1/4″ spindle. ONE AVAILABLE.