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CD 237
Hemingray - 72
  • 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.
Insulator Facts

Dimensions:4" H × 4 5⁄8" W
Primary Embossing:The Primary Embossing is typically found on the front of the insulator and usually identifies either the manufacturer (such as "Hemingray") or the company that the insulator was made for (such as "AM.TEL.&TEL.CO.")

Insulators with No Name or No Embossing are denoted as such.
 HEMINGRAY
Years Produced: c.1930s-1950s
Style Identifiers:Hemingray often used style numbers, letters, words, or a combination to differentiate their insulator styles (such as: T.S., E2, № 1 Provo Type, Muncie Type, etc.) These are often, but not always, embossed on the insulator.
72, 72A, 720
Rarity Scale 0. No specimens known
1. Extremely Common (millions known)
2. Very Common
3. Common
4. Fairly Common
5. Uncommon
6. Very Uncommon
7. Rare (dozens known)
8. Very Rare (less than a dozen known)
9. Extremely Rare (2 or 3 known)
10. Unique (only one known)
 Common (3/10)
Usage: Power (Primary Distribution)
Voltage Rating: 13,500 Volts
Value Range: This is an estimated value range only, based on historical hobby collecting data. Insulator values vary widely depending on many factors, including embossing, color, condition, mold variations, manufacturing anomalies, and other attributes. Please visit the Hemingray Values page for more information.
 $5-50
Insulator Overview

This is a high voltage double petticoat style numbered 72, and later renumbered to 720. This style was also produced in a wide saddle groove version (72.A) to accommodate larger gauge wires. This style was also produced in a triple petticoat version, CD 295, for higher voltage applications.

Related Links:
Known Embossings (8)
Primary EmbossingThe Primary Embossing is typically found on the front of the insulator and usually identifies either the manufacturer (such as "Hemingray") or the company that the insulator was made for (such as "AM.TEL.&TEL.CO.")

Insulators with No Name or No Embossing are denoted as such.
EINThe Embossing Index Number (EIN) is a unique number assigned by the collecting hobby to each distinct embossing for an insulator design. It is normally shown in brackets, e.g. [050].
EmbossingMost common terms:
(F-Skirt): Front Skirt
(R-Skirt): Rear Skirt
/: New line of embossing
{}: Special note (not embossed on the insulator)
[#]: Represents a number

Other terms:
{MLOB}: Mold Line Over Base
(F-Crown): Front Crown
(R-Crown): Rear Crown
(F-Umbrella): Front Umbrella
(R-Umbrella): Rear Umbrella
BaseThe base is the bottom of the insulator. Hemingray made 4 different types of bases:

1. SDP: Sharp Drip Points
2. RDP: Round Drip Points
3. CB: Corrugated Base
4. SB: Smooth Base
Year AddedThis is the year that this embossing was officially recognized and added to the McDougald (1991-2008) or Briel (2011-2023) insulator price guides. It is not necessarily the year this embossing was discovered.
 Photo
Status✓ = In my collection

If the value in this column says WANTED, then that specific insulator is on my wanted list! If you have that insulator and would like to sell it, click on the WANTED link to submit photos and contact me.
HEMINGRAY Unlisted (F-Skirt) HEMINGRAY-72 (R-Skirt) MADE IN U.S.A. SB - No Photo✓
HEMINGRAY [020] (F-Skirt) HEMINGRAY-72A / [# and dots] (R-Skirt) MADE IN U.S.A. / [#] {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 1995 Photo✓
HEMINGRAY [050] (F-Skirt) HEMINGRAY - 72/[# and dots] (R-Skirt) MADE IN U.S.A. SB - Photo✓
HEMINGRAY [052] (F-Skirt) HEMINGRAY-72/[# and dots] (R-Skirt) MADE IN U.S.A. {A brass bushing molded into the pinhole with a square at the top} SB 2015 No Photo-
HEMINGRAY [060] (F-Skirt) HEMINGRAY - 72/[# and dots] (R-Skirt) MADE IN U.S.A./[#] SB - Photo✓
HEMINGRAY [062] (F-Skirt) HEMINGRAY-72/[# and dots] (R-Skirt) MADE IN U.S.A./[#] {A brass bushing molded into the pinhole with a square at the top} SB 2015 Photo✓
HEMINGRAY [070] (F-Skirt) HEMINGRAY - 720 (R-Skirt) MADE IN U.S.A./[# and dots] CB - Photo✓
HEMINGRAY [080] (F-Skirt) HEMINGRAY - 720/LOWEX (R-Skirt) MADE IN U.S.A./[# and dots] SB - No PhotoWANTED
($100 Reward)
Removed Embossings (3)

The following embossing(s) were removed from the price guide because they could not be verified to exist, were consolidated with other embossings, or were otherwise ambiguous/inaccurate. They are preserved here for historical purposes.

Primary EmbossingThe Primary Embossing is typically found on the front of the insulator and usually identifies either the manufacturer (such as "Hemingray") or the company that the insulator was made for (such as "AM.TEL.&TEL.CO.")

Insulators with No Name or No Embossing are denoted as such.
EINThe Embossing Index Number (EIN) is a unique number assigned by the collecting hobby to each distinct embossing for an insulator design. It is normally shown in brackets, e.g. [050].
EmbossingMost common terms:
(F-Skirt): Front Skirt
(R-Skirt): Rear Skirt
/: New line of embossing
{}: Special note (not embossed on the insulator)
[#]: Represents a number

Other terms:
{MLOB}: Mold Line Over Base
(F-Crown): Front Crown
(R-Crown): Rear Crown
(F-Umbrella): Front Umbrella
(R-Umbrella): Rear Umbrella
BaseThe base is the bottom of the insulator. Hemingray made 4 different types of bases:

1. SDP: Sharp Drip Points
2. RDP: Round Drip Points
3. CB: Corrugated Base
4. SB: Smooth Base
 Year Removed
HEMINGRAY [010] (F-Skirt) HEMINGRAY-72 (R-Skirt) MADE IN U.S.A. RDP 2007
HEMINGRAY [030] (F-Skirt) HEMINGRAY-72.A / [#] (R-Skirt) MADE IN U.S.A. RDP 2007
HEMINGRAY [040] (F-Skirt) HEMINGRAY-72.A / [#] (R-Skirt) MADE IN U.S.A. SB 2007
Known Colors (2)
ColorThe color of the insulator.
Clear
Ice Blue