U-1710A: Russia

3 1/8" X 4 1/2" (77mm X 110mm)

 

(front incuse)

{Uzhnouralskiy}

 

Picture courtesy Bill Ostrander

3 1/8" X 4 1/2" (77mm X 110mm)

 

(front incuse)

1961 И

{Slavyansk}

 

Picture courtesy David Kresz

Note this insulator has no inner skirt. U number assignment by Bob Berry December 2017.

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