This Italian Renaissance style asymmetrical knob set was made by Reading Hardware Co. in the 1894 catalog. It is part of the B-21400 Columbian group. Sold as a pair of knobs with a spindle. The dimensions are 2.625 in. diameter x 3.125 in. D, 2.375 in. diameter x 2.75 in. D, spindle size 0.375 in.