3 5/8" X 4 5/8" (92mm X 117mm)
No markings
Picture courtesy Byron Smith |
U-1503B: Australia
3 5/8" X 4 5/8" (92mm X 117mm)
No markings
Picture courtesy Byron Smith |
Note this insulator is not threaded but had ridges for cement. U number assignment by Bob Berry February 2021.
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