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CD 164
Hemingray - 20
  • Fat Upper Lip Variant
    Some of the H.G.CO. embossed CD 164s have a larger upper lip, as shown here.
Insulator Facts

Dimensions:3 3⁄4" H × 3 1⁄4" 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: 1880s-1940
Style Identifier: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.
20
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)
 Very Common (2/10)
Usage: Power (Secondary Distribution)
Trade Name: Street Railway or Extra Deep Groove, Double Petticoat
Voltage Rating: 5,000 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.
 $1-10000
Insulator Overview

This was a very popular wide groove double petticoat style produced by Hemingray for over 60 years. The H.G.CO. embossed versions were produced in a rainbow of desirable colors. The extra deep groove allowed it to accommodate thicker wires, such as for street railway or trolley applications. This design was eventually replaced by CD 165 in 1941.

Related Links:
Known Embossings (31)
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.
H.G.CO. [005] (F-Skirt) H G CO {Note no periods} (R-Skirt) PETTICOAT SB - No Photo-
H.G.CO. [010] (F-Skirt) H G CO/PATENT MAY 2 1893 {Note no periods} (R-Skirt) PETTICOAT SDP - Photo✓
H.G.CO. [020] (F-Skirt) H.G.CO. (R-Skirt) PETTICOAT SB - Photo✓
H.G.CO. [030] (F-Skirt) H.G.CO./PATENT MAY 2 1893 (R-Skirt) PETTICOAT SDP - Photo✓
H.G.CO. [040] (F-Skirt) H.G.CO./PATENT MAY 2 1893 (R-Skirt) PETTICOAT {Smooth base mold; transition style embossing} SDP - Photo✓
H.G.CO. [045] (F-Skirt) H.G.CO./PATENT MAY 2 1893 (R-Skirt) PETTICOAT {'O'/'A'} SDP - No Photo-
H.G.CO. [046] (F-Skirt) H.G.CO./PATENT MAY 2 1893 {'8' is offset & engraved over '8'} (R-Skirt) PETTICOAT SDP 2015 No Photo-
H.G.CO. [047] (F-Skirt) H.G.CO./PATENT MAY 2 1893 {First 'T'/'L'} (R-Skirt) PETTICOAT SDP 2015 No Photo-
H.G.CO. [048] (F-Skirt) H.G.CO./PATENT MAY 2 1893 {The '1' is upside down} (R-Skirt) PETTICOAT SDP 2015 Photo✓
H.G.CO. [050] (F-Skirt) H.G.CO./PATENT MAY 2 1893 (R-Skirt) PETTICOAY {Note spelling} SDP - Photo✓
HEMINGRAY [010] (F-Skirt) HEMINGRAY (R-Skirt) № 20 SDP - Photo✓
HEMINGRAY [015] (F-Skirt) HEMINGRAY 20 {Note no dash} (R-Skirt) MADE IN U.S.A. SDP - Photo✓
HEMINGRAY [020] (F-Skirt) HEMINGRAY-20 (R-Skirt) HEMINGRAY-20 RDP - Photo✓
HEMINGRAY [030] (F-Skirt) HEMINGRAY-20 (R-Skirt) HEMINGRAY-20 SDP - Photo✓
HEMINGRAY [040] (F-Skirt) HEMINGRAY-20 (R-Skirt) MADE IN U.S.A. RDP - Photo✓
HEMINGRAY [050] (F-Skirt) HEMINGRAY-20 (R-Skirt) MADE IN U.S.A. SB - Photo✓
HEMINGRAY [060] (F-Skirt) HEMINGRAY-20 (R-Skirt) MADE IN U.S.A. SDP - Photo✓
HEMINGRAY [065] (F-Skirt) HEMINGRAY-20 (R-Skirt) MADE IN U.S.A. {Note both 'E's are missing middle bar} RDP - Photo✓
HEMINGRAY [066] (F-Skirt) HEMINGRAY – 20 (R-Skirt) MADE IN U.S.A. {Note both 'E's are missing middle bar}
Note: I discovered this embossing in 2007; first listed in 2019 price guide.		 SB 2019 No Photo✓
HEMINGRAY [067] (F-Skirt) HEMNGRAY-20 {Note spelling} (R-Skirt) MADE IN U.S.A. {Note both 'E's are missing middle bar} RDP - No Photo✓
HEMINGRAY [070] (F-Skirt) HEMINGRAY-20 (R-Skirt) MADE IN U.S.A./[#] SB - No Photo-
HEMINGRAY [080] (F-Skirt) HEMINGRAY-20/[# and dots] (R-Skirt) MADE IN U.S.A. RDP - Photo✓
HEMINGRAY [085] (F-Skirt) HEMINGRAY-20/[# and dots] (R-Skirt) MADE IN U.S.A. {Note both 'E's are missing middle bar} RDP - No Photo-
HEMINGRAY [090] (F-Skirt) HEMINGRAY-20/[# and dots] (R-Skirt) MADE IN U.S.A./[#] RDP - Photo✓
HEMINGRAY [095] (F-Skirt) HEMINGRAY-20/[# and dots] (R-Skirt) MADE IN U.S.A./[#] {Note both 'E's are missing middle bar} RDP - Photo✓
HEMINGRAY [100] (F-Skirt) HEMINGRAY-20/['42' blotted out] (R-Skirt) MADE IN U.S.A. SDP - Photo✓
HEMINGRAY [110] (F-Skirt) HEMINGRAY/MADE IN U.S.A. (R-Skirt) № 20 SDP - Photo✓
HEMINGRAY [120] (F-Skirt) HEMINGRAY/PATENTED MAY 2 1893 (R-Skirt) PETTICOAT SDP - Photo✓
HEMINGRAY [130] (F-Skirt) HEMINGRAY/[Blotted out embossing] (R-Skirt) № 20 SDP - No Photo-
HEMINGRAY [140] (F-Skirt) [# and dots]/HEMINGRAY-20 (R-Skirt) MADE IN U.S.A./[#] RDP - No Photo-
HEMINGRAY [150] (F-Skirt) ['[#]' blotted out]/HEMINGRAY/[# and dots] (R-Skirt) MADE IN U.S.A./[#] RDP - No Photo-
Removed Embossing

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.


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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
n/a
Known Colors (45)
ColorThe color of the insulator.
Aqua
Aqua Tint
Aqua w/ Milk Swirls
Blue
Blue Aqua
Blue Tint
Blue/Green Two Tone
Carnival
Clear
Clear/Aqua Two Tone
Clear/Blue Two Tone
Cornflower Blue
Dark Blue Aqua
Dark Yellow Green
Emerald Green
Green
Green Aqua
Green Tint
Hemingray Blue
Ice Aqua
Ice Blue
Ice Green
Jade Green Milk
Light Aqua
Light Blue
Light Carnival
Light Gray Green
Light Green
Light Green Aqua
Light Hemingray Blue
Light Jade Green Milk
Light Lime Green
Light Olive Green
Light Yellow Green
Lime Green
Milky Aqua
Off Clear
Olive Green
Orange Amber
Peacock Blue
Purple
Purple Tint
Steel Blue
Teal Green
Yellow Green