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2 3/4" X 4" (70mm X 102mm)
(skirt inkstamp)
Picture courtesy Bob Berry |
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U-1692: China
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2 3/4" X 4" (70mm X 102mm)
(skirt inkstamp)
Picture courtesy Bob Berry |
|
U number assignment from Worldwide Porcelain Insulators by Marilyn Albers & Jack Tod.
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