U-1406: UK

2 1/2" X 2 3/4" (61mm X 69mm)

 

 (dome) GPO↑

 

 {maker unknown}

 

 

Picture courtesy Bob Scafe

2 1/2" X 2 5/8" (61mm X 64mm)

 

 (front skirt incuse)

{Buller's}

 

Picture courtesy Bob Berry

2 1/2" X 2 5/8" (61mm X 64mm)

 

 

No markings

 

 

 

Picture courtesy Bob Scafe

U number assignment from Worldwide Porcelain Insulators 1986 Supplement by Marilyn Albers & Jack Tod.  These have also been found in New Zealand.

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