U-1644: Australia

2 1/8" X 2 1/2" (52mm X 61mm)

 

(skirt  ink stamp)            

                                        MADE IN JAPAN

{Maker unknown}

 

Picture courtesy Bob Scafe

2 1/8" X 2 1/2" (52mm X 61mm)

 

(skirt  ink stamp)  

{Maker unknown}

 

 

Picture courtesy Bob Scafe

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

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