Hemingray Insulator Profile: CD 210  
The CD 210 Postals with sharp drip points are believed to have been produced by Hemingray, while the smooth base versions were likely produced by Brookfield. (See related patent). 

Dimensions: 4 1/4" H x 3 1/2" W
Primary
Embossing:
POSTAL
Years Produced:
c.1917?
Known Embossing Collapse
 
POSTAL [030] (Top of ear) POSTAL (F-Skirt) [Vertical bar] SDP 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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