3 1/2" X 4 3/8" (88mm X 111mm)
(top incuse) K 133
Picture courtesy Bob Berry |
U-1770: Sweden
3 1/2" X 4 3/8" (88mm X 111mm)
(top incuse) K 133
Picture courtesy Bob Berry |
U number assignment from Worldwide Porcelain Insulators by Marilyn Albers & Jack Tod.
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