U-2279: Poland

3" X 3 1/4" (74mm X 80mm)

 

 (dome ink stamp)

                              N-80

{Zapel Electrical Porcelain}

 

Picture courtesy Bob Berry

3" X 3 1/4" (74mm X 80mm)

 

 (dome incuse)

.

{Jedcina Zdrój porcelain}

 

Picture courtesy Bob Scafe

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


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