U-2131: Poland

3 3/4" X 4 1/4" (92mm X 104mm)

 

 (dome inkstamp) / N 95

{Zapel Electrical Porcelain}

 

Picture courtesy Bob Scafe

3 3/4" X 4 1/4" (92mm X 104mm)

 

 (skirt inkstamp) / N 95

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{Jedlina Zdrój}

 

Picture courtesy Bob Berry

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

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