U-2263: Germany

3 7/8" X 3 7/8" (96mm X 96mm)

 

 (dome inkstamp) RIG

{Rosenthal Isolatoren GmbH}

.

 

Picture courtesy Bob Berry

3 3/4" X 3 3/4" (93mm X 94mm)

 

(top ink stamp)

{Stemag}

 

Picture courtesy Bob Berry

3 7/8" X 3 7/8" (96mm X 96mm)

 

 No markings

.

.

 

Picture courtesy Bob Berry

U number assignment from Worldwide Porcelain Insulators by Marilyn Albers & Jack Tod.


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