Hemingray Insulator Profile: CD 115  
The Hemingray No.10 is a common style known as an exchange line insulator. Around 1914, the practice of using twisted wire pairs instead of two drop-wires created the need for this style. The wire grooves are close together to accommodate the twisted wire pair. 

Dimensions: 3 1/2" H x 2 3/8" W
Primary
Embossing:
HEMINGRAY
Years Produced:
c.1914-1950s
Style Numbers:10, 16 (error)
Rarity Scale (1-10): Extremely Common (1)
Usage: Telephone
Trade Name: Exchange Line
Hobby Nickname: Exchange
Mold Variations Collapse
[045] Tall Variant
This is the [045] variant, characterized by a body that is 1/4" taller, has a rounded dome, and larger wire grooves. This was possibly an early prototype to what would eventually become the more common CD 115. This particular specimen was discovered in an antique shop in Colorado Springs in 2012.
[152] Large Upper Wire Ridge Variant
This is the [152] variant, characterized by an upper wire ridge that is larger than the middle and lower ridges. This variant was given its own EIN in 2011.
Known Embossings (27) Collapse
 
HEMINGRAY Unlisted (F-Skirt) HEMINGRAY-10 (R-Skirt) MAD IN U.S.A. {Note spelling} SDP Photo
HEMINGRAY [010] (F-Skirt) HEMIGRAY {Note spelling} (R-Skirt) PATENTED/MAY 2 1893 SDP  
HEMINGRAY [020] (F-Skirt) HEMINGRAY (R-Skirt) Nº 10 SDP Photo
NEW! HEMINGRAY [025] (F-Skirt) HEMINGRAY [Vertical bar on inside of front skirt] (R-Skirt) Nº 10 SDP < WANTED! 
HEMINGRAY [030] (F-Skirt) HEMINGRAY (R-Skirt) PATENTED SDP < WANTED! 
HEMINGRAY [040] (F-Skirt) HEMINGRAY (R-Skirt) PATENTED/MAY 2 1893 SDP Photo
NEW! HEMINGRAY [045] (F-Skirt) HEMINGRAY (R-Skirt) PATENTED/MAY 2 1893 {Variant that is 1/4" taller and has a rounded dome} SDP SDP < WANTED! 
HEMINGRAY [050] (F-Skirt) HEMINGRAY-10 (R-Skirt) MADE IN U.S.A. RDP Photo
NEW! HEMINGRAY [055] (F-Skirt) HEMINGRAY-10 (R-Skirt) MADE IN U {Note '.S.A.' is missing} RDP RDP Photo
HEMINGRAY [060] (F-Skirt) HEMINGRAY-10 (R-Skirt) MADE IN U.S.A. SDP Photo
HEMINGRAY [070] (F-Skirt) HEMINGRAY-10 (R-Skirt) MADE IN U.S.A./[Numbers and dots] CB
HEMINGRAY [080] (F-Skirt) HEMINGRAY-10 (R-Skirt) MADE IN U.S.A./[Numbers and dots] SB Photo
HEMINGRAY [090] (F-Skirt) HEMINGRAY-10 (R-Skirt) [Number]-38./MADE IN U.S.A. SB Photo
HEMINGRAY [100] (F-Skirt) HEMINGRAY-10 (R-Skirt) [Number]-38 SB Photo
HEMINGRAY [110] (F-Skirt) HEMINGRAY-10/[Numbers and dots] (R-Skirt) MADE IN U.S.A./[Number] RDP Photo
HEMINGRAY [120] (F-Skirt) HEMINGRAY-10/[Number] (R-Skirt) MADE IN U.S.A. RDP Photo
NEW! HEMINGRAY [125] (F-Skirt) HEMINGRAY-10/[Number] (R-Skirt) MADE IN U.S.A./[Number] SB < WANTED! 
HEMINGRAY [130] (F-Skirt) HEMINGRAY-10/['[Number]' blotted out] (R-Skirt) MADE IN U.S.A./[Numbers and dots] SB
HEMINGRAY [140] (F-Skirt) HEMINGRAY-16 {Note '16' style number} (R-Skirt) MADE IN U.S.A./[Numbers and dots]
Note: Embossing was corrected in 2015 to indicate [Numbers and dots]. Original embossing specified [Numbers], which was inaccurate.
SB Photo
HEMINGRAY [150] (F-Skirt) HEMINGRAY/MADE IN U.S.A. (R-Skirt) Nº 10 SDP Photo
HEMINGRAY [152] (F-Skirt) HEMINGRAY / MADE IN U.S.A. (R-Skirt) Nº10 {Top wire ridge is larger than middle & lower wire ridge} SDP Photo
HEMINGRAY [155] (F-Skirt) HEMNGRAY-10 {Note spelling} (R-Skirt) MADE IN U.S.A. SDP Photo
HEMINGRAY [160] (F-Skirt) HENNGRAY-10 {Note spelling} (R-Skirt) MADE IN U.S.A.
Note: I believe this embossing may be the same as [155]. Since the "M" and "I" are stamped over each other, it could be interpreted as an "N".
SDP < WANTED! 
HEMINGRAY [170] (F-Skirt) HEWINGRAY {Note spelling} (R-Skirt) Nº 10 SDP Photo
HEMINGRAY [180] (F-Skirt) HEWINGRAY/MADE IN U.S.A. {Note spelling} (R-Skirt) Nº 10 SDP Photo
NEW! HEMINGRAY [185] (F-Skirt) [Numbers and dots]/HEMINGRAY-10 (R-Skirt) MADE IN U.S.A. RDP
NEW! HEMINGRAY [190] (F-Skirt) [Numbers and dots]/HEMINGRAY-10 (R-Skirt) MADE IN U.S.A./[Number] RDP

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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