Hemingray Insulator Profile: CD 164  
This is a very popular wide groove double petticoat style. It was replaced by CD 165 in 1941. 

Dimensions: 3 3/4" H x 3 1/4" W
Primary
Embossings:
• H.G.CO.
• HEMINGRAY
Years Produced:
c.1880s-1940
Style Number:20
Rarity Scale (1-10): Very Common (2)
Usage: Secondary Power Distribution
Trade Name: Street Railway or Extra Deep Groove, Double Petticoat
Voltage Rating: 5,000 Volts
Mold Variation Collapse

Fat Upper Lip Variant

Some of the H.G.CO. embossed CD 164s have a larger upper lip, as shown here.

Known Embossings (31) Collapse
 
H.G.CO. [005] (F-Skirt) H G CO {Note no periods} (R-Skirt) PETTICOAT SB < WANTED! 
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' is engraved over 'A'} SDP < WANTED! 
NEW! H.G.CO. [046] (F-Skirt) H.G.CO./PATENT MAY 2 1893 {'8' is offset & engraved over '8'} (R-Skirt) PETTICOAT SDP < WANTED! 
NEW! H.G.CO. [047] (F-Skirt) H.G.CO./PATENT MAY 2 1893 {First 'T' is engraved over an 'L'} (R-Skirt) PETTICOAT SDP < WANTED! 
NEW! H.G.CO. [048] (F-Skirt) H.G.CO./PATENT MAY 2 1893 {The '1' is upside down} (R-Skirt) PETTICOAT SDP Photo
H.G.CO. [050] (F-Skirt) H.G.CO./PATENT MAY 2 1893 (R-Skirt) PETTICOAY {Note spelling} SDP Photo
HEMINGRAY Unlisted (F-Skirt) HEMINGRAY 20 (R-Skirt) MADE IN U.S.A. {Note both 'E's are missing middle bar}
Note: Same embossing as [065], but with a Smooth Base.
SB Photo
HEMINGRAY [010] (F-Skirt) HEMINGRAY (R-Skirt) Nº 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 [067] (F-Skirt) HEMNGRAY-20 {Note spelling} (R-Skirt) MADE IN U.S.A. {Note both 'E's are missing middle bar} RDP  
HEMINGRAY [070] (F-Skirt) HEMINGRAY-20 (R-Skirt) MADE IN U.S.A./[Number] SB < WANTED! 
HEMINGRAY [080] (F-Skirt) HEMINGRAY-20/[Numbers and dots] (R-Skirt) MADE IN U.S.A. RDP Photo
HEMINGRAY [085] (F-Skirt) HEMINGRAY-20/[Numbers and dots] (R-Skirt) MADE IN U.S.A. {Note both 'E's are missing middle bar} RDP < WANTED! 
HEMINGRAY [090] (F-Skirt) HEMINGRAY-20/[Numbers and dots] (R-Skirt) MADE IN U.S.A./[Number] RDP Photo
HEMINGRAY [095] (F-Skirt) HEMINGRAY-20/[Numbers and dots] (R-Skirt) MADE IN U.S.A./[Number] {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) Nº 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) Nº 20 SDP
HEMINGRAY [140] (F-Skirt) [Numbers and dots]/HEMINGRAY-20 (R-Skirt) MADE IN U.S.A./[Number] RDP < WANTED! 
HEMINGRAY [150] (F-Skirt) ['[Numbers]' blotted out]/HEMINGRAY/[Numbers and dots] (R-Skirt) MADE IN U.S.A./[Number] RDP < WANTED! 

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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