The color of the brown glaze on these insulators reminds me of the brown bean pots that were popular in the 1950's but these insulators most likely date back to the 1920's to 30's.
According to "Collectors Weekly"; "Insulators were originally designed to keep the wires linking telegraphs and telephones insulated from the wooden poles that held them aloft. In conjunction with the expansion of rural electrification in the early 20th century, there was a major boom in the manufacturing of insulators, peaking from the 1920s through the 1940s... Many insulators were produced without any markings."
Insulators used for high-voltage power transmission were usually made from glass or porcelain. Porcelain insulators like these are covered with a smooth glaze to shed water. These are both threaded and have a glossy exterior. Both are in Excellent Condition.
These are heavy enough to make nice bookends or door stops, or great for rustic or industrial decor, or perfect for DIY projects. One insulator is slightly taller than the other. Both are in the "mushroom" shape. One is about 3 3/4" tall while the other is 3 1/2".
If you prefer only one just email and the listing can be adjusted to one @ $7 (plus the shipping cost for only one). Currently the price is for both insulators.
Now also at brick and mortar store: Leonardtown Maryland Antique Center
If in Maryland; visit me at Leonardtown Maryland Antique Center. Happy Holidays!