U-1929: New Zealand
3 1/2" X 4 1/2" (86mm X 110mm)
(dome incuse) NZI
Picture courtesy Bob Berry |
This is a dryspot insulator where the center piece unscrews and allows a wire to pass up and over to allow for protection of a portion of the telephone drop wire from rain. U number assignment from Worldwide Porcelain Insulators by Marilyn Albers & Jack Tod.