*Threadless insulators have a tapered pinhole that is wider at the bottom than at the top. This one is about 1/8 wider on the inside at the bottom than at the top.
**Believed to be about 1850's and Possibly Made In Canada on what I've found.
Black Glass is a Green Glass such a deep green you cannot see the color green and most of the companies stopped making Black Glass about 1880.
This was done in a 3 piece Mold as can be seen in the photo up above which dates from 1870 and earlier.

Like to know whom made this? I believe I've already found it....
http://www.cjow.com/archive/article.php?month=7&a=07Canadian+Wade+Insulators.htm&year=1996