U-3016: Japan

5 3/8" X 4 1/8" (135mm X 102mm)

 

 (skirt inkstamp)      

                                68

                                JAPAN

{NGK}

 

Picture courtesy Bob Berry

5 3/8" X 4 1/8" (135mm X 102mm)

 

 (skirt inkstamp)      

                                59

                                MADE IN JAPAN

{Unknown}

 

Picture courtesy Craig Polkinghorne

5 3/8" X 4 1/8" (140mm X 105mm)

 

 (skirt incuse)         

                              (around logo) MADE IN OCCUPIED JAPAN

 

{Shofu}

 

Picture courtesy Craig Polkinghorne

5 3/8" X 4 1/8" (139mm X 105mm)

 

 (skirt inkstamp)      

                             MADE IN JAPAN

                              54

{Shofu}

 

Picture courtesy Craig Polkinghorne

5 3/8" X 4 1/4" (142mm X 108mm)

 

 (skirt incuse)  

                       OTK

                       JAPAN

                       1967

 

{OTK}

 

Picture courtesy Craig Polkinghorne

5 3/8" X 4 1/4" (140mm X 108mm)

 

 

 (skirt inkstamp) 

                       (around logo) MADE IN JAPAN 64            

               

{OTK}

 

 

Picture courtesy Craig Polkinghorne

5 1/4" X 4 3/8" (140mm X 110mm)

 

(front skirt inkstamp)  

                                 MADE IN JAPAN

(rear skirt inkstamp)

 

 

Picture courtesy Craig Polkinghorne

5 1/4" X 4 1/4" (140mm X 107mm)

 

(front skirt inkstamp)  1958

                                 

                                 MADE IN JAPAN

 

 

 

Picture courtesy Craig Polkinghorne

5 3/8" X 4 1/8" (144mm X 104mm)

 

(front skirt inkstamp)  

(rear skirt inkstamp) 1960

                                 MADE IN JAPAN

 

Picture courtesy Craig Polkinghorne

 

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


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