Hemingray Insulator Profile: CD 231  
These are more commonly found with the Kimble embossing, although the earlier ones are Hemingray-embossed. 

Dimensions: 3 1/2" H x 5 1/8" W
Primary
Embossings:
• HEMINGRAY
• KIMBLE
Years Produced:
1951+
Style Number:820
Rarity Scale (1-10): Fairly Common (4)
Known Embossings (4) Collapse
 
HEMINGRAY [010] (F-Skirt) HEMINGRAY - 820 (R-Skirt) MADE IN U.S.A./[Numbers] CB < WANTED! 
HEMINGRAY [020] (F-Skirt) HEMINGRAY - 820/TEMPERED (R-Skirt) MADE IN U.S.A./[Numbers and dots] CB Photo
KIMBLE [010] (F-Skirt) KIMBLE - 820/TEMPERED (R-Skirt) MADE IN U.S.A./[Numbers and dots] CB < WANTED! 
KIMBLE [020] (F-Skirt) KIMBLE - 820/['HEMINGRAY' blotted out]/TEMPERED (R-Skirt) MADE IN U.S.A./[Numbers and dots] CB 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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