1Cast Iron Ornate Doorknob Rosette RE-011December 20, 2018/in Recently Sold Hardware Past Sales/by adminCirca 1880 cast iron doorknob and rosette in nice condition by Russell & Erwin knob measures 2-1/4″ in diameter and takes a 1/4″ spindle. rosette measures 2-1/8″ in diameter. PRICE FOR TWO PIECES