U-1831: Japan

2 3/8" X 3 1/4" (58mm X 80mm)

 

(skirt instamp) PAK T&T 

                      

                      1966

                       MADE IN JAPAN

{Maker unknown}

 

Picture courtesy Bob Scafe

2 3/8" X 3 1/4" (58mm X 80mm)

 

(skirt instamp) PAK P&T 

                      

                      1954

                       MADE IN JAPAN

{Maker unknown}

 

Picture courtesy Bob Scafe

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

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