Hemingray Insulator Profile: CD 309.5  
This insulator was one of two experimental styles Hemingray produced for Westinghouse (see also CD 286.9). This style was designed to be mounted upside-down on the crossarm (see patent). There is only one specimen known. It was discovered by a Hemingray employee in the Hemingray Dump in the 1960s along with several other one-of-a-kind Hemingrays. (Read the article here.) 

Dimensions: 10" H x 7 1/2" W
Primary
Embossing:
WESTINGHOUSE
Years Produced:
c.1900s
Style Number:Telluride Type B
Rarity Scale (1-10): Unique (10)
Known Embossing Collapse
 
WESTINGHOUSE [010] (F-Skirt) WESTINGHOUSE ELECTRIC & M'F'G CO./PITTSBURG, PA. (R-Skirt) "TELLURIDE" TYPE B. SB < WANTED! 

The following embossings were removed from the price guide because they could not be verified to exist:

Unverified Embossings
Year Removed





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Insulator photo courtesy of Bill Meier from www.insulators.info and used with permission.

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