Hemingray Insulator Profile: CD 317  
Nicknamed the "Candlestick", this is one of four insulator styles Hemingray produced for the Chambers lightning rod system (see patent). 

Dimensions: 7 1/2" H x 7" W
Years Produced:
Rarity Scale (1-10): Uncommon (5)
Usage: Lightning Rod System
Hobby Nickname: Candlestick
Known Embossings (2) Collapse
CHAMBERS [005] (F-Center) CHAMBERS/PAT AUG 14 1877 {'H' is engraved over an 'N'} (R-Center) PATENT/DEC 19 1871 {'P' is engraved over a 'T'} SB < WANTED! 
CHAMBERS [010] (F-Center) CHAMBERS/PAT AUG 14 1877 (R-Center) PATENT/DEC 19 1871 SB Photo

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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