Antique
Dual # 2 or # 3 Eagle Brand Burner
for
Oil or Kerosene Lamps or Lanterns 
Made in the USA 
One Only!
This is a dual burner that can fit a No 2 Oil Lamp or a No 3 Oil Lamp. It has dual threads it will fit either lamp size.  The No 2 is 1/3/16" and the No # is 1 13/16". Eagle Brand burners are made in the U.S.A.  This kind are hard to find. Maybe it is just what you have been looking for. Also Check out my Esty Store:  Just Beachy for Jesus