4 3/4" X 3 3/4" (121mm X 96mm)
(skirt inkstamp) {NGK}
Picture courtesy Craig Polkinghorn |
U-2620: Japan
4 3/4" X 3 3/4" (121mm X 96mm)
(skirt inkstamp) {NGK}
Picture courtesy Craig Polkinghorn |
U number assignment from Worldwide Porcelain Insulators by Marilyn Albers & Jack Tod.
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