Hemingray Insulator Profile: CD 237  
This is a high voltage double petticoat style numbered 72, and later renumbered to 720. This was also produced in a triple petticoat style, CD 295

Dimensions: 4" H x 4 5/8" W
Primary
Embossing:
HEMINGRAY
Years Produced:
c.1930s-1950s
Style Numbers:72, 720, 72A
Rarity Scale (1-10): Common (3)
Usage: Primary Power Distribution
Voltage Rating: 13,500 Volts
Mold Variation Collapse

72A Wide Groove Variant

This wide groove variant has a wider saddle groove to accomodate a larger wire. These wide groove styles are all denoted by the "A" appended to the end of the style number. In 2007, all of the CD 237 72A embossings were culled from the price guide because it was suspected they did not exist. Since then, [020] (pictured here) has been verified and was reinstated in the 2011 price guide; [030] and [040] remain unaccounted for.

Known Embossings (7) Collapse
 
HEMINGRAY [020] (F-Skirt) HEMINGRAY-72A / [Numbers and dots] (R-Skirt) MADE IN U.S.A. / [Number] {Wide saddle groove}
Note: Embossing was removed from the 2007 price guide, but re-added in 2011 when the embossing was verified to exist.
SB Photo
HEMINGRAY [050] (F-Skirt) HEMINGRAY - 72/[Numbers and dots] (R-Skirt) MADE IN U.S.A. SB Photo
NEW! HEMINGRAY [052] (F-Skirt) HEMINGRAY-72/[Numbers and dots] (R-Skirt) MADE IN U.S.A. {A brass bushing molded into the pinhole with a square at the top} SB < WANTED! 
HEMINGRAY [060] (F-Skirt) HEMINGRAY - 72/[Numbers and dots] (R-Skirt) MADE IN U.S.A./[Number] SB Photo
NEW! HEMINGRAY [062] (F-Skirt) HEMINGRAY-72/[Numbers and dots] (R-Skirt) MADE IN U.S.A./[Number] {A brass bushing molded into the pinhole with a square at the top} SB Photo
HEMINGRAY [070] (F-Skirt) HEMINGRAY - 720 (R-Skirt) MADE IN U.S.A./[Numbers and dots] CB Photo
HEMINGRAY [080] (F-Skirt) HEMINGRAY - 720/LOWEX (R-Skirt) MADE IN U.S.A./[Numbers and dots] SB < WANTED! 

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

Unverified Embossings
Year Removed
HEMINGRAY [010] (F-Skirt) HEMINGRAY-72 (R-Skirt) MADE IN U.S.A. RDP 2007
HEMINGRAY [030] (F-Skirt) HEMINGRAY-72.A / [Numbers] (R-Skirt) MADE IN U.S.A. RDP 2007
HEMINGRAY [040] (F-Skirt) HEMINGRAY-72.A / [Numbers] (R-Skirt) MADE IN U.S.A. SB 2007





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