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CD 220
Hemingray - 670
  • Small Saddle Ridge Variant
    This is the [040] mold variation, which has a smaller wire ridge, a more pinched saddle groove running from front to back (perpendicular to the embossing) and is also 1/8" taller. This mold appears to only have been made in 1947.
  • Locke Hi-Top Style Variant
    This is the CD 220 No Embossing [010], Locke Hi-Top Style variant. There are two distinguishing features of the Locke Hi-Top style: the top wire ridge has an extra "step" and the ears are flatter. Photo courtesy of Bill Meier.
Insulator Facts

Dimensions:4 1⁄4" H × 3 3⁄4" W
Primary Embossings: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.
Years Produced: c.1937-1940s
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.
67, 670
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)
Series:600
Voltage Rating: 10,000 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.
 $10-400
Insulator Overview

This style is the middle size in the "600" series, between the larger 680 (CD 221) and the smaller 660 (CD 218 and 219) styles. Intended for use as primary power distribution insulators, the earliest embossed specimens have a "67" style number, which was later changed to "670". Specimens in amber are the most desirable colors to collectors.
Known Embossings (12)
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 [010] (F-Skirt) HEMINGRAY - 67/[# and dots] (R-Skirt) MADE IN U.S.A./[#] SB - Photo✓
HEMINGRAY [020] (F-Skirt) HEMINGRAY - 670 (R-Skirt) MADE IN U.S.A./[# and dots] CB - No Photo-
HEMINGRAY [030] (F-Skirt) HEMINGRAY - 670 (R-Skirt) MADE IN U.S.A./[# and dots] SB - Photo✓
HEMINGRAY [040] (F-Skirt) HEMINGRAY - 670 (R-Skirt) MADE IN U.S.A./[#] {Smaller ridge and a saddle groove running from front to rear} CB - Photo✓
HEMINGRAY [050] (F-Skirt) HEMINGRAY - 670/LOWEX (R-Skirt) MADE IN U.S.A./[# and dots] SB - Photo✓
HEMINGRAY [070] (F-Skirt) HEMINGRAY - 670/LOWEX/REG. U.S. PAT. OFF. (R-Skirt) MADE IN U.S.A./[# and dots] SB - Photo✓
HEMINGRAY [080] (F-Skirt) HEMINGRAY - 670/[# and dots] (R-Skirt) MADE IN U.S.A./[#] SB - No Photo-
HEMINGRAY [082] (F-Skirt) HEMINGRAY-670/[# 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 [090] (F-Skirt) HEMINGRAY - 670/['LOWEX/REG. U.S. PAT. OFF.' blotted out] (R-Skirt) MADE IN U.S.A./[# and dots] CB - Photo✓
HEMINGRAY [095] (F-Skirt) HEMINGRAY - 670/['LOWEX/REG. U.S. PAT. OFF.' blotted out] (R-Skirt) MADE IN U.S.A./[# and dots] SB - No Photo-
HEMINGRAY [100] (F-Skirt) HEMINGRAY - 670/['LOWEX' blotted out] (R-Skirt) MADE IN U.S.A./[# and dots] CB - No Photo-
NO EMBOSSING [010] [No embossing] {Locke Hi-Top style} SB - No PhotoWANTED
Removed Embossings (2)

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 [060] (F-Skirt) HEMINGRAY-670 / LOWEX / REG. U.S. PAT. OFF. (R-Skirt) MADE IN U.S.A. / [# and dots] CB 2003
HEMINGRAY [110] (F-Skirt) HEMINGRAY-670 / ['LOWEX' blotted out] / REG. U.S. PAT. OFF. (R-Skirt) MADE IN U.S.A. / [# and dots] CB 2003
Known Colors (15)
ColorThe color of the insulator.
Blue Tint
Clear
Dark Orange Amber
Green Tint
Honey Amber
Ice Aqua
Ice Green
Ice Green w/ Treated Top
Light Golden Amber
Light Green
Light Lemon
Off Clear
Olive Amber
Peach
Straw