The maker of this pair of knobs is unknown. It has a six-fold pattern with a daisy-like flower in the center. This pair definitely date before 1900, probably around 1885. This pair very likely was a companion to an Eastlake back plate. The belted knobs have the pattern on the topside and on the backside. A standard-size spindle works.
The knobs measure 2 1/4 inches across. The set consists of two matching knobs, a spindle, and two set screws. The set is in excellent condition and is ready to use.