CD 100-144

Side wire groove - Single petticoat

CD 104

CD 104

Size: 63mm x 92mm (2.5" x 3.625")

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Years produced: c.1870s - 1880s
Style (CD) scarcity: 4, 51- 250 known*
Intended use: Telephone
Style / catalog number: 4 (Patent Dec 19, 1871 Units only)
Number of unique insulators:
11
Notes: * Style scarcity listing is in the context of Hemingray units. The CD 104 in itself, is fairly common.

NEW ENG.TEL.& TEL.CO. Units:
Vast majority of the CD 104 insulators are NOT Hemingray. Hemingray made ones are quite hard to find. For info on identifying them see this link and phone more photos this link. Also note that Hemingray made ones are all [075] but not all [075] are Hemingray.

Patent Dec 19, 1871 units:
They use to be known as CD 124.1 In 2019 they where moved to CD 104

Primary Embossing = Embossing on the front of the insulator, usually is that manufacturers name or the customers name. No embossing units will be noted as NO EMBOSSING. Units with no name but with numbers or letters will be noted as NO NAME. Examples: HEMINGRAY S.B.T.&.T.Co NO NAME NO EMBOSSING

EIN = Embossing Index Number is a standardized way to identify each unique embossing.

(FS) = Front Skirt (RS) = Rear Skirt (DO) = Dome (CR) = Crown (FC) = Front Crown (RC) = Rear Crown (BG) = Between Grooves (FA ) = Front, Above wire groove (FB) = Front, Below wire groove (BE) = Base Embossed (FU) = Front Umbrella (RU) = Rear Umbrella (FCE) = Front Center (RCE) = Rear Center (TE) = Top Ear (TOP) = Top of Pinhole / = Next line of embossing

There are unique characteristics of the insulator that are not related to the embossing, but is worth noting. Examples: Factory molded brass bushing Flaired skirt MLOB = Mold Line Over Base Waffle top Wide saddle groove

Base = the bottom of the insulator. It is noted in the following standardized ways. SDP = Sharp Drip Points RDP = Round Drip Points CB = Corrugated Base SB = Smooth Base

= Insulator has been verified that exists = Insulator has been verified that exists, but not listed in the "guide" = Insulator has not yet been verified as existing = Suspected error listing in the "guide" because listing does not match up with known manufacturing practices. Such as numbers and dots on an aqua insulator, or insulators listed with both factory molded brass bushing and without. Many do not come in both configurations and are listed as coming in both. Etc.

Color = The approximate color of the insulator. Due to manufacturing variations, insulators with the same color name maybe slightly different in actual appearance.

Primary Embossing EIN Embossing Special Features Base Color Verified?

NEW ENG.TEL.& TEL.CO.

[075]

(FS) (Arc)NEW ENG.TEL & TEL./CO. (Hemingray product)

SB

Aqua

NEW ENG.TEL.& TEL.CO.

[075]

(FS) (Arc)NEW ENG.TEL & TEL./CO. (Hemingray product)

SB

Blue

NEW ENG.TEL.& TEL.CO.

[075]

(FS) (Arc)NEW ENG.TEL & TEL./CO. (Hemingray product)

SB

Light Blue Aqua

NEW ENG.TEL.& TEL.CO.

[075]

(FS) (Arc)NEW ENG.TEL & TEL./CO. (Hemingray product)

SB

Yellow Green

PATENT - DEC. 19, 1871

[010]

(FC) PATENT/DEC. 19. 1871 (RC) 4

SB

Aqua

PATENT - DEC. 19, 1871

[010]

(FC) PATENT/DEC. 19. 1871 (RC) 4

SB

Green Aqua

PATENT - DEC. 19, 1871

[010]

(FC) PATENT/DEC. 19. 1871 (RC) 4

SB

Ice Green

PATENT - DEC. 19, 1871

[010]

(FC) PATENT/DEC. 19. 1871 (RC) 4

SB

Light Aqua

PATENT - DEC. 19, 1871

[010]

(FC) PATENT/DEC. 19. 1871 (RC) 4

SB

Light Purple

PATENT - DEC. 19, 1871

[010]

(FC) PATENT/DEC. 19. 1871 (RC) 4

SB

Off Clear

PATENT - DEC. 19, 1871

[010]

(FC) PATENT/DEC. 19. 1871 (RC) 4

SB

Purple Tint

  • Blue Aqua

    PATENT - DEC. 19, 1871

    [010]

    Aqua

    Details

    Previously known as CD 124.1 in 2019 it became part of CD 104

  • Blue Aqua

    NEW ENG.TEL.& TEL.CO.

    [075]

    Blue Aqua

  • Blue

    NEW ENG.TEL.& TEL.CO.

    [075]

    Blue

  • Light Aqua

    NEW ENG.TEL.& TEL.CO.

    [075]

    Light Aqua

  • Light Blue Aqua

    NEW ENG.TEL.& TEL.CO.

    [075]

    Light Blue Aqua

  • Yellow Green

    NEW ENG.TEL.& TEL.CO.

    [075]

    Yellow Green

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