1Norwalk Lock Hardware Doorknob Nor-491March 27, 2022/in Interior Doorknobs Brass & Iron, Norwalk Lock Co./by adminRare pattern in this cast brass or bronze doorknob by Norwalk Lock Co. in nice condition no dings or dents measures 2-1/4″ in diameter and takes a 1/4″ spindle. ADCA designation K-22500.