lot of antique brown swirl door knobs, vintage architectural hardware

Lot of vintage old brown swirl slip pottery door knobs with iron stems and spindles. There six doorknobs (three pairs) in this lot. They measure 2 1/4" across and 1 5/8" to 2" long over the pottery knob and the cast iron stem. They are 5 1/4" to 6 1/2' long over the pairs with the spindles.

These old door knobs have some wear and crazing to the pottery knobs.