U-2537: New Zealand
3 3/4" X 3 3/4" (95mm X 95mm)
(inkstamp) NZI "in an oval"
Picture courtesy Bob Scafe |
3 3/4" X 3 3/4" (95mm X 95mm)
No markings
Picture courtesy Bob Scafe |
U number assignment from Worldwide Porcelain Insulators by Marilyn Albers & Jack Tod.