U-1935: Denmark
3 1/4" X 4 1/4" (82mm X 108mm)
(Cap top embossed) 1938 {Norden}
Picture courtesy Tomas Merski |
Shown with cap removed (Cap top embossed) 1938 {Norden}
Picture courtesy Tomas Merski |
This is a dryspot insulator where the top unscrews to expose openings inside the skirt and wire groove to allow a telephone drop wire to pass through the insulator to provide a "dry spot" from rain and decrease leakage loss. U number assignment from Worldwide Porcelain Insulators by Marilyn Albers & Jack Tod.