These small knobs (only 2 inches across) have the unusual hour-glass necks. They are made of heavy cast brass. The length of the neck is one inch.
There is no pattern on this set. They are smooth brass. Therefore, they would go with a variety of back plates or plain brass rosettes. The set includes a spindle and 4 set screws. (There are two set screws for each knob.)
This style of knob is uncommon for our area.