I have a thing for vintage glass. Since I was a young girl, I have collected vintage bottles and all kinds of glass odds and ends. Yesterday, at Gee Dub (my local Goodwill store) a pair of Hemingray glass insulators jumped out and grabbed me. They were a steal at $3.00 each. Of course, I love the fact that they are vintage glass, but I am especially drawn to the wonderful industrial shape and history, as well.
Glass insulators were used on wooden telephone poles, in the first half of the last century, made by various manufacturers in a variety of unique shapes and colors. After a bit of research, I found that my Hemingray 42s are the "Double Petticoat" style (isn't that cute?) and were manufactured from 1921 through the 1950s.
Apparently, insulators are quite collectible. There are regional insulator shows, clubs, and even the National Insulator Association, if you are so inclined.