We have a vintage (may be antique) vintage cast iron lamp finial.  It is black with a few very small area's of light rust.  It measures about 4 3/8" in H x 2" in W at it's widest point x about 7/8" across the bottom round - the inner round which is threaded measures about 3/8" across the center.

I will ship internationally, please contact me with your country for a shipping quote.

Lamp Finial Ornate Vintage Cast Iron