|
2 1/4" X 2 3/4" (55mm X 87mm)
(Top of ear) "concentric circles" // "number in a circle"
Picture courtesy Bill Ostrander |
U-1821: Russia
|
2 1/4" X 2 3/4" (55mm X 87mm)
(Top of ear) "concentric circles" // "number in a circle"
Picture courtesy Bill Ostrander |
U number assignment from Worldwide Porcelain Insulators by Marilyn Albers & Jack Tod.
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