Hemingray Insulator Profile: CD 732.2  
This rare style is essentially a CD 131.4 without threads. Three of these insulators were found on a house in Cincinnati in 1993. It is believed to have been the house of George Floyd. Floyd applied for a patent for a special pin that would "spring out" up inside a threadless insulator with an extra cavity in the dome area (see patent). For more information, read this article

Dimensions: 4 1/8" H x 3" W
Primary
Embossing:
PATENT - DEC. 19, 1871
Years Produced:
c.1871
Style Number:1
Rarity Scale (1-10): Extremely Rare (9)
Usage: Telegraph
Known Embossing Collapse
 
PATENT - DEC. 19, 1871 [010] (F-Crown) PATENT/DEC. 19. 1871 (R-Crown) 1 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 Shaun Kotlarsky and used with permission.

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