One doorknob and One escutcheon catalog # C-15900 maker and year unknown at this time. Odd-shaped knob made of heavy cast bronze with what appears to be a brass plate finish to give it the gold look. The cast bronze knob weighs over 1/2 lb. while the escutcheon is nearly a full lb.  At its widest point knobs are over 2-1/2" wide. These were under brown and/or white paint so there may be a trace of it here or there. Despite the paint the original finish remained in good condition. I can't say for sure these are rare, but they definitely are not common. I sell and come across many unique knobs, and these are the only ones of this style I have ever come across.  (Saying that I'll probably get a dozen emails of people who have many of these, I await your photos).

Sets sold separately. Each set includes one knob and one escutcheon. Four sets available at posting.  Matching spindle included with every purchase of two.
 
Please remember that these are old pieces, many coming from homes 100+ years old so they will NEVER EVER be perfect and will always show some evidence of natural wear.  I will happily provide any other additional information that I have and or provide you with additional/better pictures upon request.  

W-11